Final California 2024 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 1 - North Coast Region

Water Body Name: Eel River HU, Upper Main HA (Includes Tomki Creek)
Water Body ID: CAR1116206119990528152745
Water Body Type: River & Stream
 
DECISION ID
78544
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Temperature, water
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016)
Revision Status Revised
Sources: Flow Alteration/Regulation/Modification | Removal of Riparian Vegetation
TMDL Name: Eel River, Upper Mainstem Sediment and Temperature TMDLs
TMDL Project Code: 602
Date TMDL Approved by USEPA: 12/29/2004
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for removal from the Section 303(d) List under Section 4.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status. Nineteen lines of evidence are available in the administrative record.

Zero of 6 samples from the mainstem Eel River (LOEs 101033, 43225, & 101020) exceed the objective for COLD. Zero of 4 samples from Blue Slide Creek (LOEs 101018 & 101030), and Bucknell Creek (LOEs 133579 & 101099) exceed the objective for COLD. Zero of two samples from Outlet Creek (LOE 43970) exceed the objective for COLD. Zero of one samples from Trout Creek l(LOE101023), Bear Creek (LOE 101029), Rattlesnake Creek (LOE 101034), Panther Creek (LOE 100995), Thistle Glade Creek (LOE 101035), Cold Creek (LOE 101031), Corbin Creek (LOE 101032), and Rice Creek (101022) exceed the objective for COLD. These sample sizes are not sufficient to determine with the power and confidence of the Listing Policy if the cold freshwater habitat (COLD) beneficial use is being protected in these water bodies, as a minimum of 26 samples is needed for application of Table 4.2.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. (3) The "Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek, and Lake Pillsbury) TMDLs for Temperature and Sediment" has confirmed temperatures in the Upper Main HA (including Tomki Creek) do not reflect natural conditions. (4) Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101033
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 11.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.4mi above Trout Cr. (111ERATRC).
Temporal Representation: The samples were collected between the dates of 10/10/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 31521
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The following process is utilized to interpret the narrative temperature objective in the Basin Plan for impairment assessments. Step 1: Determine if temperatures reflect natural conditions. If Yes, then the water body is not considered impaired, if No, then go to Step 2. Step 2: Determine if temperatures adversely affect beneficial uses. If Yes, then the water body is considered impaired, if No , then go to Step 3. Step 3: Determine if temperatures are increased by 5 degrees F. If Yes, then water body is impaired, if No, then water body is not impaired.
Data Reference: Presentation: Interpreting Temperature Standards in the North Coast Region. North Coast Regional Water Quality Control Board.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EVIDENCE OF ALTERATION OF NATURAL RECEIVING WATER TEMPERATURES (NON-NATURAL TEMPS): The water temperatures of the Eel River HU, Upper Main HA do not reflect natural conditions as environmental factors that influence water temperature have been altered by riparian shade removal and flow alterations due to dam construction (USEPA 2004). EVIDENCE OF SALMONID PRESENCE & LIFE CYCLE USE: Coho, steelhead, and Chinook are present in the watershed (USEPA 2004). Rearing occurs year round and spawning/ incubation/ emergence occurs from November to June (Busby et al. 1996; CDFG 2004; Myers et al. 1998). Non-core rearing occurs in the mainstem Upper Main Eel River, while core rearing occurs in tributaries to the Upper Main.
Guideline Reference: Recovery Strategy for California Coho Salmon: Report to the California Fish and Game Commission
Guideline Reference: Status Review of Chinook Salmon from Washington, Idaho, Oregon, and California.
Guideline Reference: Status Review of West Coast Steelhead from Washington, Idaho, Oregon, and California
Guideline Reference: Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Total Maximum Daily Loads for Temperature and Sediment
 
Spatial Representation: Information pertains to the Eel River HU, Upper Main HA (Includes Tomki Creek)
Temporal Representation: Data are reflective of current conditions in this water body.
Environmental Conditions:
QAPP Information: Information is considered to be of adequate quality for the Integrated Report process.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100995
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 15.5 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Panther Creek ~2.6mi above Welch Cr. (111PS0160).
Temporal Representation: The samples were collected between the dates of 7/25/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101034
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 16.4 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rattlesnake Creek ~0.5mi above Eel River (111WER008).
Temporal Representation: The samples were collected between the dates of 7/23/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101023
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 17.2 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Trout Creek ~0.1mi above Eel River (111WER003).
Temporal Representation: The samples were collected between the dates of 6/10/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101032
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 18.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Corbin Creek ~0.1mi abive Eel River (111CBCAER).
Temporal Representation: The samples were collected between the dates of 8/8/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101020
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 4.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.75 miles above Wesley Ives Creek (111WE0816).
Temporal Representation: The samples were collected between the dates of 6/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101031
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 21.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Cold Creek above Eel River (111FS0007).
Temporal Representation: The samples were collected between the dates of 7/11/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 4784
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Unknown
Temporal Representation: Unknown
Environmental Conditions: Unknown
QAPP Information: Unknown
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43970
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Water Temperature.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature. 
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Per "Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids" (Carter 2008): The lethal temperature evaluation guideline for both steelhead adult migration & holding and juvenile growth & rearing of 24°C applies in this water body July-October. The lethal temperature evaluation guideline for salmonid spawning, egg incubation & fry emergence is 20C and applies November-June in this water body. See LOE ID 31521 for more information on natural temperature alterations and salmonid presence and periodicity in this water body.
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 46803
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) TMDLs for Temperature and Sediment were approved by the USEPA on December 29, 2004. The TMDL concludes that anthropogenic alterations to riparian canopy have increased temperatures in the Upper Main HA. Modeling results reflect that current stream temperatures are elevated compared to stream temperatures under natural conditions, and improvement in riparian canopy is needed.
Data Reference: Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Total Maximum Daily Loads for Temperature and Sediment
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Information pertains to the Eel River HU, Upper Main HA (Includes Tomki Creek) water body.
Temporal Representation: Data are reflective of current conditions in this water body.
Environmental Conditions:
QAPP Information: Information is considered to be of adequate quality for the Integrated Report process.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43225
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Water Temperature.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature. 
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Per "Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids" (Carter 2008): The lethal temperature evaluation guideline for both steelhead adult migration & holding and juvenile growth & rearing of 24°C applies in this water body July-October. The lethal temperature evaluation guideline for salmonid spawning, egg incubation & fry emergence is 20C and applies November-June in this water body. See LOE ID 31521 for more information on natural temperature alterations and salmonid presence and periodicity in this water body.
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101022
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 19.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rice Creek ~0.5mi above Rice Fork (111PS0110).
Temporal Representation: The samples were collected between the dates of 6/9/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101099
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 8.9 - 16.4 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 8/27/2013 - 10/15/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 133579
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 7.3 - 0.1 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 11/7/2013 - 12/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101018
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 12.4 - 13.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 5/2/2012 - 6/7/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101035
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 15.3 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Thistle Glade Creek ~1mi above Eel River (111TGCAER).
Temporal Representation: The samples were collected between the dates of 7/24/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101029
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 17.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bear Creek ~1.2mi above Blue Slides Cr. (111FS0001).
Temporal Representation: The samples were collected between the dates of 7/5/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78544, Temperature, water
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101030
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 15.6 - 16.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 7/6/2011 - 7/19/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103961
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: 2,3,4,6-tetrachlorophenol
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One line of evidence are available in the administrative record to assess this pollutant. None of the 2 samples exceed the objective for protection of MUN.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of 2 samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103961, 2,3,4,6-tetrachlorophenol
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25591
 
Pollutant: 2,3,4,6-tetrachlorophenol
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the two 2,3,4,6-tetrachlorophenol samples collected in the Upper Mainstem Eel River watershed exceed the evaluation guideline. Both samples were detected but not quantified (with a reporting limit of 0.002 ug/l). The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per the "Quality Criteria for Water 1986" (USEPA 1986), also known as the Gold Book: The 2,3,4,6-tetrachlorophenol criterion to control undesirable taste and odor qualities of ambient water is estimated at 1.0 ug/l.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: Samples were collected from February 2002 to June 2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
100909
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Aldicarb
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Three lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100909, Aldicarb
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109584
 
Pollutant: Aldicarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aldicarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100909, Aldicarb
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109582
 
Pollutant: Aldicarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aldicarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Aldicarb is the USEPA Aquatic Life Benchmark of 10 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100909, Aldicarb
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109583
 
Pollutant: Aldicarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aldicarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for aldicarb incorporated by reference in the Water Quality Control Plan, North Coast Basin is 3 ug/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
102594
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Aldrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3 of the Listing Policy. Under section 3 a single line of evidence are necessary to assess listing status.

Seven lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121231
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Aldrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Aldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107643
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Aldrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin criteria for the protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121423
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Aldrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Aldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106415
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Aldrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin to protect of human health from the consumption of water and organisms is 0.00013 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122590
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Aldrin, Total. Nine sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin to protect of human health from the consumption of water and organisms is 0.00013 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122591
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Aldrin, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin to protect of human health from the consumption of water and organisms is 0.00013 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 102594, Aldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118824
 
Pollutant: Aldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aldrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for aldrin to protect aquatic life in freshwater as criterion maximum concentration is 3 ug/L . This established criteria was divided by 2 in order to better represent a CMC value as specified in footnote g of Table (b)(1) of the California Toxics Rule, 2000.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103946
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Alkalinity as CaCO3
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Twenty seven lines of evidence are available in the administrative record to assess this pollutant.
Eleven out of five hundred seventy five samples exceed the objective for the COLD beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Eleven out of five hundred seventy five samples exceed the objective for the COLD beneficial use and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117270
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119155
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 44
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 44 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116289
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0110)
Temporal Representation: The samples were collected between the dates of 2014-06-09 and 2014-06-09
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116311
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119156
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 61
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 61 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115815
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108331
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113118
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 70
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 70 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-10-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108431
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0007)
Temporal Representation: The samples were collected between the dates of 2011-07-11 and 2011-07-11
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102291
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2012-07-19
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119157
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111210
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 61
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 61 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116771
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Perennial Stream Surveys data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0160)
Temporal Representation: The samples were collected between the dates of 2011-07-25 and 2011-07-25
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106207
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 51
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 51 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119151
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 62
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 62 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119560
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 54
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 54 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103962
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102325
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119150
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 51
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 51 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117292
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108297
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118826
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106834
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109235
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103946, Alkalinity as CaCO3
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119152
 
Pollutant: Alkalinity as CaCO3
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 64
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 64 samples exceeded the water quality standard for Alkalinity as CaCO3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
101972
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Ametryn
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101972, Ametryn
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118857
 
Pollutant: Ametryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Ametryn.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ametryn as a drinking water level is a concentration of 0.06 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104109
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Aminomethyl Phosphonic Acid (AMPA)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Two line(s) of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104109, Aminomethyl Phosphonic Acid (AMPA)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118897
 
Pollutant: Aminomethyl Phosphonic Acid (AMPA)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for AMPA.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for AMPA is the USEPA Aquatic Life Benchmark of 249500 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104109, Aminomethyl Phosphonic Acid (AMPA)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118896
 
Pollutant: Aminomethyl Phosphonic Acid (AMPA)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for AMPA.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for AMPA is the USEPA Aquatic Life Benchmark of 249500 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
79244
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Ammonia
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Pollutant name changed from "Nitrogen, ammonia (Total Ammonia)" to "Ammonia"

This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Thirty-seven lines of evidence are available in the administrative record to assess this pollutant.

Zero of 41 Ammonia as Nitrogen samples exceed the objective for the COLD beneficial use. Zero of 505 Ammonia (Unionized) samples exceed the objective for the MUN beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of 41 Ammonia as Nitrogen samples exceed the objective for the COLD beneficial use. Zero of 505 Ammonia (Unionized) samples exceed the objective for the MUN beneficial use. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110487
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34574
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. Both data are reported as quantitation limits. These quantitation limits are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Update of Ambient Water Quality Criteria for Ammonia (USEPA 1999): Where salmonids and fish early life stages are present, the 30-day average concentration (criterion continuous concentration or CCC) of total ammonia (as mg N/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH, temperature, and the presence of early life stages of fish. The CCC formula is found on p.83 and the table of CCC values are found on p.87.
Guideline Reference: 1999 Update of Ambient Water Quality Criteria for Ammonia
 
Spatial Representation: Samples were collected at 111PS0008 (Outlet Creek).
Temporal Representation: Samples were collected on 9/9/2008 and 9/29/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34511
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Fish Spawning
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 3 of the 4 data are reported as non-detect limits. These non-detect limits are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Update of Ambient Water Quality Criteria for Ammonia (USEPA 1999): Where salmonids and fish early life stages are present, the 30-day average concentration (criterion continuous concentration or CCC) of total ammonia (as mg N/L) in freshwater are not to be exceeded more than once every three years on average. The CCC values are based on pH, temperature, and the presence of early life stages of fish. The CCC formula is found on p.83 and the table of CCC values are found on p.87.
Guideline Reference: 1999 Update of Ambient Water Quality Criteria for Ammonia
 
Spatial Representation: Sample was collected at 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 2/26/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114998
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111453
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2012-07-19
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114466
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115760
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111569
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117490
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109172
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103539
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111635
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0007)
Temporal Representation: The samples were collected between the dates of 2011-07-11 and 2011-07-11
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118860
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113707
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108364
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107631
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110656
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110531
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114632
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2011-07-06
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118861
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102697
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 38
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 38 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112927
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 49
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 49 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119426
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 54
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 54 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111254
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107010
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 57
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 57 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107008
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 55
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 55 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107157
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 64
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 64 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-10-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112926
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119196
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 56
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 56 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107113
 
Pollutant: Ammonia (Unionized)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Ammonia as NH3.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Ammonia as a drinking water level is a concentration of 30 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 26311
 
Pollutant: Ammonia as Nitrogen
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Migration | Fish Spawning | Freshwater Replenishment | Preservation of Rare & Endangered Species | Warm Freshwater Habitat | Wildlife Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 41 ammonia as nitrogen samples collected from Upper Mainstem Eel River exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per the National Recommended Water Quality Criteria (USEPA 2006): The 1-hour average concentration (acute criterion or CMC) of total ammonia nitrogen (in mg N/L) for freshwater where salmonid fish are present, which is not to be exceeded more than once every three years on average, is calculated using the following equation: CMC=0.275/(1+10^(7.204 - pH)) + 39.0/(1+10^(pH - 7.204)).
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115009
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114954
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118859
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104551
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113245
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79244, Ammonia
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111646
 
Pollutant: Nitrogen, ammonia (Total Ammonia)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Ammonia as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013 document.
Objective/Criterion Reference: Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2011-07-06
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
101710
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Antimony
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Eighty lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105526
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110968
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106226
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114386
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106234
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113069
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111261
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105501
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102582
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102494
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114366
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113060
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110972
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102576
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105497
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119203
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106257
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119805
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102512
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106242
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102449
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106196
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111023
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102599
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113205
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113191
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119583
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102541
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106186
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113011
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102455
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119511
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102495
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119573
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113126
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106309
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107134
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111277
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111011
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107088
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112897
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102545
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111007
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119561
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111021
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106277
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110979
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106293
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110981
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117148
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119529
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113089
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102491
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114429
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113027
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111019
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106279
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110999
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119138
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106275
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102469
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113113
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102611
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110988
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Antimony criterion for the protection of human health from consumption of organisms only is 4300 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113195
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102511
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105473
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102510
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102533
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102526
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119508
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119532
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110944
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114367
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110965
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110978
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110949
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106245
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106239
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106250
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110952
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107023
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112991
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119490
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119421
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114339
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102595
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113201
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102460
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112988
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113199
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113202
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119555
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119496
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107147
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119447
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107067
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106256
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119396
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110958
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102554
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110969
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110960
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114375
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113214
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102606
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102521
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119539
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Antimony. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for antimony incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.006 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111018
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117200
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107024
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119135
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117147
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111020
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119128
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102623
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110982
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113037
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110985
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101710, Antimony
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113114
 
Pollutant: Antimony
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Antimony.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that toxicity to algae occurs at antimony concentrations as low as 610 ug/L.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
100668
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Arsenic
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One-hundred and twenty-one lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the Objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of the samples exceeded the Objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106217
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113059
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105500
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119437
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102456
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113215
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114368
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105471
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113192
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111762
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112980
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102657
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114414
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113001
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119537
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102466
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107078
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102509
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41401
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Arsenic.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114392
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108988
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102651
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102478
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102549
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102477
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122612
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Arsenic, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122613
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Arsenic, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference: Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119495
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102480
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102560
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113105
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113718
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113030
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119140
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120080
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102503
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114421
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113111
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112990
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114352
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105483
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113048
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108977
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104007
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102652
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113034
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102604
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106259
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114451
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102520
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102614
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114391
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113106
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113072
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106269
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112974
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105539
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102654
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108618
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102615
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113208
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119515
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106229
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114334
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102690
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117208
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113041
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106218
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119545
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119516
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102580
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106187
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111761
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102535
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119176
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119193
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114337
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119527
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106311
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117211
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113062
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113054
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119500
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111239
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106214
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113197
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119571
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113047
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119435
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105482
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111245
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105499
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105469
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105225
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119544
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119187
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114357
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119408
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114336
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107080
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102583
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119504
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119434
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102536
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102689
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106211
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110945
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102619
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113033
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110970
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114445
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106264
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102550
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106247
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106235
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113217
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106221
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122281
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for arsenic is 33 mg/Kg dry weight (MacDonald et al. 2000a).
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122252
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Arsenic .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for arsenic is 33 mg/Kg dry weight (MacDonald et al. 2000a).
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114181
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112969
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113024
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102557
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115771
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102519
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113211
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111958
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119541
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119139
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113032
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102552
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102457
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102612
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102490
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106312
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114449
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The dissolved arsenic criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater for dissolved arsenic is 150 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102648
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Arsenic.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100668, Arsenic
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122614
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Arsenic, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 2/4/2002-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
78519
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Arsenic | Cadmium | Chromium | Chromium (total) | Copper | Lead | Mercury | Nickel | Selenium | Silver | Zinc
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Data from this group metals decision are now evaluated in their own individual decision for the 2018 Integrated Report.  Please see the individual metals decisions for status of these pollutants in this waterbody.  This decision will be retired during the next Integrated Report cycle
 
Regional Board Decision Recommendation: Data from this group metals decision are now evaluated in their own individual decision for the 2018 Integrated Report.  Please see the individual metals decisions for status of these pollutants in this waterbody.  This decision will be retired during the next Integrated Report cycle
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32860
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for copper.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41174
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Chromium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32861
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for lead.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42279
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Lead.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42778
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to Total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42690
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42741
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32862
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42983
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4.6 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43131
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43388
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Selenium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43327
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Selenium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32863
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for silver.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion maximum concentrations (1-hour average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43356
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Silver.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32864
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for zinc.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43271
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Zinc.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41401
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Arsenic.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for arsenic is 0.010 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 21523
 
Pollutant: Arsenic | Cadmium | Chromium (total) | Copper | Lead | Mercury | Nickel | Selenium | Silver | Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 383
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 383 metals samples collected in the Upper Mainstem Eel River exceed the objectives. For each of the 10 metal samples, there were 14 samples each collected at the Van Arsdale site, 5 samples each at the Hearst site, and 19 to 22 samples each at the Dos Rios site. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): Arsenic objective is 0.05 mg/L. Cadmium objective is 0.01 mg/L. Chromium objective is 0.05 mg/L. Lead objective is 0.05 mg/L. Mercury objective is 0.002 mg/L. Selenium objective is 0.01 mg/L. Silver objective is 0.05 mg/L. Per 22 CCR 64431: Nickel maximum contaminant level is 0.1 mg/L. Per 22 CCR 64449: Copper secondary maximum contaminant level is 1.0 mg/L. Zinc secondary maximum contaminant level is 5.0 mg/L.
Objective/Criterion Reference: Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32845
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for cadmium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41458
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Cadmium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 33957
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for chromium III or the criteria for chromium VI.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each chromium III sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. The criterion continuous concentration (4-day average) to protect aquatic life in freshwater for chromium VI is 11 ug/L and is not hardness dependent.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios)
Temporal Representation: Samples collected between 11/13/07 and 7/15/08.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78519, Multiple Pollutants
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41208
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Copper.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
 
DECISION ID
103117
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Atrazine
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103117, Atrazine
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122615
 
Pollutant: Atrazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Atrazine, Total. Seven sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for atrazine is 1 ug/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103117, Atrazine
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103018
 
Pollutant: Atrazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Atrazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of < 1 ug/L for a nonvascular plant (acute). The benchmark was derived from a \less-than\" value (for example, <1,500) and may underestimate toxicity."
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103117, Atrazine
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103017
 
Pollutant: Atrazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Atrazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for atrazine is 1 ug/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103117, Atrazine
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103016
 
Pollutant: Atrazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Atrazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Atrazine is the USEPA Aquatic Life Benchmark of < 1 ug/L for a nonvascular plant (acute). The benchmark was derived from a \less-than\" value (for example, <1,500) and may underestimate toxicity."
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104139
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Azinphos, Ethyl (Ethyl Guthion)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Three line(s) of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104139, Azinphos, Ethyl (Ethyl Guthion)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122627
 
Pollutant: Azinphos, Ethyl (Ethyl Guthion)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Azinphos Ethyl, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to National Academy of Sciences Water Quality Criteria (1972), the Azinphos, Ethyl (Ethyl Guthion) criteria is 0.0875 mg/L. (EPA-R3-73-033)
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104139, Azinphos, Ethyl (Ethyl Guthion)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101847
 
Pollutant: Azinphos-methyl (Guthion)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Azinphos Methyl. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The National Recommended Water Quality Criteria for Azinphos Methyl (Guthion) for the protection of freshwater aquatic life is a maximum of 0.01 ug/l.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104139, Azinphos, Ethyl (Ethyl Guthion)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122626
 
Pollutant: Azinphos, Ethyl (Ethyl Guthion)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Azinphos Ethyl, Total. Nine sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to National Academy of Sciences Water Quality Criteria (1972), the Azinphos, Ethyl (Ethyl Guthion) criteria is 0.0875 mg/L. (EPA-R3-73-033)
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
101723
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Barium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Forty lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105466
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114345
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111247
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107125
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117209
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119190
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102686
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102671
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106197
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106195
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119182
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119502
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106322
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113014
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113016
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102672
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114338
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119185
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113013
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114340
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102701
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111269
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107112
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113049
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105495
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119439
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111265
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119191
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119195
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105502
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119444
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119201
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119202
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113045
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105480
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105489
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111272
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107119
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107102
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101723, Barium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119581
 
Pollutant: Barium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Barium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for barium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
78807
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Benthic Community Effects
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Benthic Community Effects are being considered for placement on the CWA section 303(d) List under sections 3.9 of the Listing Policy. Under section 3.9, additional lines of evidence (LOEs) associating the Benthic Community Effects decision with a water or sediment concentration of pollutants other than benthic-macroinvertebrate bioassessment or habitat assessment LOEs are necessary to place a water body on the 303(d) List for Benthic Community Effects.

There are several lines of evidence available to evaluate this indicator. Three of the 43 benthic macroinvertebrate samples exceed the California Stream Condition Index (CSCI) impairment threshold and there are multiple pollutants listed for impairment in this water body. More information is needed to determine whether or not the beneficial uses in this water body are being supported. Causal assessment monitoring in the areas where the CSCI scores are below 0.79 should be conducted to further understand these CSCI scores. Twelve of the13 of the habitat assessments in this water body showed the habitat to likely intact with only one score showing the habitat to be possibly altered.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101034
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 16.4 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rattlesnake Creek ~0.5mi above Eel River (111WER008).
Temporal Representation: The samples were collected between the dates of 7/23/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101031
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 21.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Cold Creek above Eel River (111FS0007).
Temporal Representation: The samples were collected between the dates of 7/11/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101033
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 11.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.4mi above Trout Cr. (111ERATRC).
Temporal Representation: The samples were collected between the dates of 10/10/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101099
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 8.9 - 16.4 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 8/27/2013 - 10/15/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101018
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 12.4 - 13.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 5/2/2012 - 6/7/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101030
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 15.6 - 16.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 7/6/2011 - 7/19/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118853
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122604
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101032
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 18.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Corbin Creek ~0.1mi abive Eel River (111CBCAER).
Temporal Representation: The samples were collected between the dates of 8/8/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 31521
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The following process is utilized to interpret the narrative temperature objective in the Basin Plan for impairment assessments. Step 1: Determine if temperatures reflect natural conditions. If Yes, then the water body is not considered impaired, if No, then go to Step 2. Step 2: Determine if temperatures adversely affect beneficial uses. If Yes, then the water body is considered impaired, if No , then go to Step 3. Step 3: Determine if temperatures are increased by 5 degrees F. If Yes, then water body is impaired, if No, then water body is not impaired.
Data Reference: Presentation: Interpreting Temperature Standards in the North Coast Region. North Coast Regional Water Quality Control Board.
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EVIDENCE OF ALTERATION OF NATURAL RECEIVING WATER TEMPERATURES (NON-NATURAL TEMPS): The water temperatures of the Eel River HU, Upper Main HA do not reflect natural conditions as environmental factors that influence water temperature have been altered by riparian shade removal and flow alterations due to dam construction (USEPA 2004). EVIDENCE OF SALMONID PRESENCE & LIFE CYCLE USE: Coho, steelhead, and Chinook are present in the watershed (USEPA 2004). Rearing occurs year round and spawning/ incubation/ emergence occurs from November to June (Busby et al. 1996; CDFG 2004; Myers et al. 1998). Non-core rearing occurs in the mainstem Upper Main Eel River, while core rearing occurs in tributaries to the Upper Main.
Guideline Reference: Recovery Strategy for California Coho Salmon: Report to the California Fish and Game Commission
Guideline Reference: Status Review of Chinook Salmon from Washington, Idaho, Oregon, and California.
Guideline Reference: Status Review of West Coast Steelhead from Washington, Idaho, Oregon, and California
Guideline Reference: Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Total Maximum Daily Loads for Temperature and Sediment
 
Spatial Representation: Information pertains to the Eel River HU, Upper Main HA (Includes Tomki Creek)
Temporal Representation: Data are reflective of current conditions in this water body.
Environmental Conditions:
QAPP Information: Information is considered to be of adequate quality for the Integrated Report process.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 133579
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Temperature. Data range from 7.3 - 0.1 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 11/7/2013 - 12/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101023
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 17.2 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Trout Creek ~0.1mi above Eel River (111WER003).
Temporal Representation: The samples were collected between the dates of 6/10/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101029
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 17.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bear Creek ~1.2mi above Blue Slides Cr. (111FS0001).
Temporal Representation: The samples were collected between the dates of 7/5/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100995
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 15.5 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Panther Creek ~2.6mi above Welch Cr. (111PS0160).
Temporal Representation: The samples were collected between the dates of 7/25/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101035
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 15.3 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Thistle Glade Creek ~1mi above Eel River (111TGCAER).
Temporal Representation: The samples were collected between the dates of 7/24/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117916
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25373
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 38
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: One of the 38 aluminum samples collected from the Upper Mainstem Eel River exceed the objective. Sample concentrations range from 4.29 to 1,737.00 ug/L. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): The Maximum Contaminant Level for aluminum is 1.0 mg/l (1,000 ug/L).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122603
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108086
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109377
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122605
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 6
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 6 of 20 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 2/4/2002-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41313
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Aluminum.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 96396
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 1
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: The site had a CSCI score(s) of 0.786075662, 0.701636017, 1.163189987, 0.944699596, 1.028890877, 1.051969251, 1.130959517, 1.110036092, 1.088632514, 1.036560778, 1.053819223, 1.021319221, 1.032229286, 1.216910053, 0.937793947, 0.883728734, 1.049542903.

The samples taken on 7/26/2011 average to 1.037569222.
The samples taken on 8/8/2013 average to 0.7438558395.

Therefore, only 1 out of the 17 samples exceeded the water quality objective and does not support the aquatic life beneficial use.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: From the Water Quality Control Plan, North Coast Region: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rhen, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Guideline Reference: Bioassessment in complex environments: designing an index for consistent meaning in different settings
 
Spatial Representation: These samples were collected at the following station: 111CBCAER
Temporal Representation: These samples were collected on: 8/8/2013
Environmental Conditions:
QAPP Information: Data collected following SWAMP QA protocols. QAPP for SWAMP Reference Condition Management Plan.
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 96753
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: The site had a CSCI score(s) of 0.921818, 0.93683, 0.9447, 0.945943, 0.984442, 0.985554, 0.993075, 1.016662, 1.028891, 1.032229, 1.036561, 1.051969, 1.053819, 1.063167, 1.088633
1.119634, 1.13096, 1.18668, 1.19127, 1.192803, 1.220624, 1.228622, 1.239888, 1.240843

Additionally, this water body passed several screening criteria and was identified as a reference water body for the purposes of developing the CSCI. Reference sites where human disturbance is absent or minimal are used to set benchmark expectations for healthy streams. A large set of nearly 600 reference sites representing the broad diversity of natural stream types found across California was used to develop the CSCI.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: From the Water Quality Control Plan, North Coast Region: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rhen, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.
Guideline Reference: Bioassessment in complex environments: designing an index for consistent meaning in different settings
 
Spatial Representation: These samples were collected at the following stations:
111CBCAER
111TGCAER
111ERATRC
111WE0816
111WER003
111FS0007
111WER003
111WER003
111FS0001
111PS0110
111FS0008
111FS0007
111HSCAER
111WER008
111FS0008
111TGCAER
111FS0008
111PS0110
111TGCAER
111WER159
111WER159
111WER159
111PS0160
111WER159
Temporal Representation: These samples were collected on:
6/20/2001
9/20/2004
10/10/2012
6/12/2013
9/21/2004
6/21/2001
6/14/2001
9/21/2004
7/5/2011
6/9/2014
6/7/2012
7/11/2011
7/26/2011
8/7/2003
7/6/2011
9/12/2000
7/19/2012
6/24/2009
8/17/2010
6/29/2004
9/16/2009
8/3/2009
7/25/2011
6/24/2009
Environmental Conditions:
QAPP Information: Data collected following SWAMP QA protocols. QAPP for SWAMP Reference Condition Management Plan.
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32165
 
Pollutant: Benthic-Macroinvertebrate Bioassessments
LOE Subgroup: Population/Community Degradation
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 2
 
Data and Information Type: Benthic macroinvertebrate surveys
Data Used to Assess Water Quality: Two of the two samples collected had an IBI score below 52.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Index of Biological Integrity (IBI) is a multi-metric assessment that employs biological metrics that respond to a habitat or water quality impairment. Each of the biological metrics measured at a site are converted to an IBI score then summed. These cumulative scores are then ranked. For the Northern California IBI, sites with scores below 52 are considered to have impaired conditions.
Guideline Reference: Development of a Benthic Index of Biotic Integrity (B-IBI) for Wadeable Streams in Northern Coastal California and its Application to Regional 305(b) Assessment
 
Spatial Representation: The samples were collected at Outlet Creek, station code 111PS0008.
Temporal Representation: The samples were collected on September 9, 2008 and September 29, 2008.
Environmental Conditions:
QAPP Information: The sample was collected for the SWAMP Perennial Streams Assessment.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 132725
 
Pollutant: Habitat Assessment (Streams)
LOE Subgroup: Ancillary Line of Evidence
Matrix: -N/A
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: HABITAT ASSESSMENT
Data Used to Assess Water Quality: The site had IPI scores of 1.13, 1.05, 1.2, 0.99, 0.97, 0.91, 1.05, 1.11, 1.01, 1.02, 0.96, 1.02 and 1.09. Most of these scores indicate that the habitat is either Likely Intact or but one score shows it is Possibly Altered.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: From the Water Quality Control Plan, North Coast Region: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Physical characteristics of a site vary due to both natural factors and human disturbance. Statistical models based on a large statewide reference data set can help distinguish natural variability from anthropogenic stress. These models work across the diverse stream types found in California. The Index of Physical Habitat Integrity (IPI) is a multimetric Index developed based on these models to characterize physical habitat condition for streams in California. Index scores near 1 indicate physical habitat conditions similar to reference, whereas lower scores indicate degradation. For the purposes of making statewide assessments, three thresholds (analogous to those used for the CSCI) were established based on the 30th; 10th; and 1st percentiles of IPI scores at reference sites. These three thresholds divide the IPI scoring range into 4 categories of physical condition as follows: greater than or equal to 0.94 = likely intact condition; 0.93 to 0.84 = possibly altered condition; 0.83 to 0.71 = likely altered condition; less than or equal to 0.70 = very likely altered condition. Scores of 0.83 or lower indicate that the physical habitat has been altered and low CSCI scores from this site may be due to impacts to the physical habitat.
Guideline Reference: An Index to Measure the Quality of Physical Habitat in California Wadeable Streams
 
Spatial Representation: These samples were collected at the following stations:
111FS0001
111CE0551
111FS0008
111FS0007
111CBCAER
111ERATRC
111WE0816
111HSCAER
111PS0160
111PS0110
111TGCAER
111WER003
Temporal Representation: These samples were collected on:
7/5/2011
5/27/2015
7/6/2011
7/19/2012
8/8/2013
10/10/2012
6/12/2013
7/26/2011
7/25/2011
6/9/2014
7/24/2012
6/10/2014
Environmental Conditions:
QAPP Information: Data collected following SWAMP QA protocols. QAPP for SWAMP Reference Condition Management Plan.
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 4783
 
Pollutant: Sedimentation/Siltation
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Unknown
Temporal Representation: Unknown
Environmental Conditions: Unknown
QAPP Information: Unknown
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 4784
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Unknown
Temporal Representation: Unknown
Environmental Conditions: Unknown
QAPP Information: Unknown
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43970
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Water Temperature.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature. 
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Per "Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids" (Carter 2008): The lethal temperature evaluation guideline for both steelhead adult migration & holding and juvenile growth & rearing of 24°C applies in this water body July-October. The lethal temperature evaluation guideline for salmonid spawning, egg incubation & fry emergence is 20C and applies November-June in this water body. See LOE ID 31521 for more information on natural temperature alterations and salmonid presence and periodicity in this water body.
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43225
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Water Temperature.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature. 
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Per "Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids" (Carter 2008): The lethal temperature evaluation guideline for both steelhead adult migration & holding and juvenile growth & rearing of 24°C applies in this water body July-October. The lethal temperature evaluation guideline for salmonid spawning, egg incubation & fry emergence is 20C and applies November-June in this water body. See LOE ID 31521 for more information on natural temperature alterations and salmonid presence and periodicity in this water body.
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 46803
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) TMDLs for Temperature and Sediment were approved by the USEPA on December 29, 2004. The TMDL concludes that anthropogenic alterations to riparian canopy have increased temperatures in the Upper Main HA. Modeling results reflect that current stream temperatures are elevated compared to stream temperatures under natural conditions, and improvement in riparian canopy is needed.
Data Reference: Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Total Maximum Daily Loads for Temperature and Sediment
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Information pertains to the Eel River HU, Upper Main HA (Includes Tomki Creek) water body.
Temporal Representation: Data are reflective of current conditions in this water body.
Environmental Conditions:
QAPP Information: Information is considered to be of adequate quality for the Integrated Report process.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101020
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 4.8 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.75 miles above Wesley Ives Creek (111WE0816).
Temporal Representation: The samples were collected between the dates of 6/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78807, Benthic Community Effects
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101022
 
Pollutant: Temperature, water
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Temperature. Data range from 19.7 degrees C.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. At no time or place shall the temperature of any COLD water be increased more than 5 degrees Fahrenheit (F) above natural receiving water temperature.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to Carter (2008) the lethal temperature for spawning, incubation, and emergence life stages are 20 degrees C. The lethal temperatures for adult migration and holding, and juvenile migration and rearing is 24 degrees C. 
Guideline Reference: Effects of Temperature, Dissolved Oxygen/Total Dissolved Gas, Ammonia, and pH on Salmonids. Implications for California's North Coast TMDLs. California Regional Water Quality Control Board, North Coast Region
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rice Creek ~0.5mi above Rice Fork (111PS0110).
Temporal Representation: The samples were collected between the dates of 6/9/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
101725
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Beryllium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Eighty lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111217
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112916
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117172
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107089
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107138
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112930
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107087
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112896
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107116
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119481
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105523
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117153
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119853
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107037
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112893
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107036
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111225
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110976
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117149
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112934
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111237
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107132
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105521
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112917
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117126
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107059
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119479
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119450
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119477
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113074
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105514
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111289
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102675
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107155
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107135
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119838
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102677
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119469
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119818
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106292
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111267
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107068
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105504
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117131
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107076
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107066
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119400
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107082
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119160
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119158
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112945
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107079
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107096
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107085
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110994
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117192
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117169
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113000
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112920
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119807
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107091
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102650
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106310
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112894
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119863
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107063
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102631
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119820
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102640
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111211
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111003
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119394
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107065
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for beryllium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107142
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112911
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102564
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112939
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107053
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102643
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101725, Beryllium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117158
 
Pollutant: Beryllium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Beryllium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA criteria for water quality states chronic toxicity to freshwater aquatic life for berrylium occurs at a concentration of 0.0053 mg/L. (USEPA, 1986).
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
101906
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Bifenthrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. One lines of evidence are available in the administrative record to assess this pollutant. Zero of the three samples exceed the objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.This conclusion is based on the staff findings that:1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.3. Zero fo the three samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101906, Bifenthrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110199
 
Pollutant: Bifenthrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Bifenthrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The genus mean acute value for rainbow trout (O. mykiss) is 0.15 ug/L (DFG 00-6, 2000).
Guideline Reference: Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
79106
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Boron
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: "This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Five lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the six samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met."
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 79106, Boron
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111580
 
Pollutant: Boron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Boron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water, including irrigation of various types of crops and stock watering. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The guideline for boron is 700 ug/L (0.7 mg/L).
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79106, Boron
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115995
 
Pollutant: Boron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Boron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water. Notification levels are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The notification level for Boron is 1 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79106, Boron
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111591
 
Pollutant: Boron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Boron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water. Notification levels are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The notification level for Boron is 1 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79106, Boron
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34175
 
Pollutant: Boron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: None of the 4 samples analyzed exceeded the evaluation guideline of 0.7 mg/L.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin (NCRWQCB 2011): Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water, including irrigation of various types of crops and stock watering. At or below the limits presented in the Water Quality Goals tables, agricultural uses of water should not be limited. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The criteria for boron is 700 ug/L (0.7 mg/L).
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected approximately quarterly from November 2007 to July 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79106, Boron
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108264
 
Pollutant: Boron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Boron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water, including irrigation of various types of crops and stock watering. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The guideline for boron is 700 ug/L (0.7 mg/L).
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
101173
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Cadmium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Ninety-nine lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective for the MUN, COLD & WARM beneficial uses.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective for the MUN, COLD, & WARM beneficial uses and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106181
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102546
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102634
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113082
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104562
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119455
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119473
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117479
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112970
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113356
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113006
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105465
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113101
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113123
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102673
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110992
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102662
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113070
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119483
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119840
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119880
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110623
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110205
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119132
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112983
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106308
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107090
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119398
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105522
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119828
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117185
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102641
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107103
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119412
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119810
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105533
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119855
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102665
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102656
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102313
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106307
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119143
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106191
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102679
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105535
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105524
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102547
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111229
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102605
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117143
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122033
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for cadmium in 4.98 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122316
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Cadmium .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for cadmium in 4.98 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32845
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for cadmium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105862
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105468
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102659
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41458
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Cadmium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113817
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122641
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Cadmium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122640
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Cadmium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111213
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102516
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119844
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122642
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Cadmium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119874
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111002
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102598
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119869
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113128
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119470
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104540
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114621
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110993
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106189
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105525
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112968
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106193
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106284
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119878
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102636
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106190
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113043
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117137
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106184
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114406
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110206
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111207
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102544
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113099
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113125
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119476
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119829
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111231
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for cadmium 0.005 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102649
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119125
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119830
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102653
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110207
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Cadmium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 101173, Cadmium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117196
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cadmium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
103001
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Carbaryl
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103001, Carbaryl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110219
 
Pollutant: Carbaryl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Carbaryl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for carbaryl as a drinking water level with a one in a million cancer risk is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103001, Carbaryl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110220
 
Pollutant: Carbaryl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Carbaryl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA National Recommended Aquatic Life criteria pursuant to Section 304(a) of the Clean Water Act for Carbaryl is 2.1 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103001, Carbaryl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110218
 
Pollutant: Carbaryl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Carbaryl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA national ambient water quality criterion for freshwater aquatic life criterion continuous concentration expressed as a 4 day average for carbaryl is 2.1 µg/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103019
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Carbophenothion
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103019, Carbophenothion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110222
 
Pollutant: Carbophenothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Carbophenothion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Carbophenothion (Trithion) is 0.007 mg/L.
Guideline Reference: CDPH Archived Advisory Levels for Drinking Water. Archived Advisory Levels are currently considered Notification Levels.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
73384
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Chloride
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Sixteen lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category (i.e., sufficient justification to not list). This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. (3) Zero of 45 samples from upper mainstem Eel River exceed the objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102039
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112634
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0007)
Temporal Representation: The samples were collected between the dates of 2011-07-11 and 2011-07-11
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 44110
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chloride.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for chloride is 250 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41373
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Chloride.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for chloride is 250 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25427
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 41 chloride samples collected in the Upper Mainstem Eel River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per 22 CCR 64449: The recommended Secondary Maximum Contaminant Level for chloride is 250 mg/L.
Guideline Reference: Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110224
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102072
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2012-07-19
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102149
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114576
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119895
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Perennial Stream Surveys data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0160)
Temporal Representation: The samples were collected between the dates of 2011-07-25 and 2011-07-25
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117363
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102105
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0110)
Temporal Representation: The samples were collected between the dates of 2014-06-09 and 2014-06-09
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107653
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117891
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104897
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73384, Chloride
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102116
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chloride.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for chloride is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104177
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Chlorpyrifos, methyl
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104177, Chlorpyrifos, methyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122653
 
Pollutant: Chlorpyrifos, methyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceed the criterion for Chlorpyrifos Methyl, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The USEPA Health Advisory for life time exposure to Chlorpyrifos is 0.002 mg/L (EPA 820-R-11-002 Drinking Water Standards and Health Advisories, 2011).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104177, Chlorpyrifos, methyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122654
 
Pollutant: Chlorpyrifos, methyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Chlorpyrifos Methyl, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The USEPA Health Advisory for life time exposure to Chlorpyrifos is 0.002 mg/L (EPA 820-R-11-002 Drinking Water Standards and Health Advisories, 2011).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104177, Chlorpyrifos, methyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110238
 
Pollutant: Chlorpyrifos, methyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Chlorpyrifos Methyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Chlorpyrifos Methyl is the USEPA Aquatic Life Benchmark of 0.085 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104177, Chlorpyrifos, methyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110239
 
Pollutant: Chlorpyrifos, methyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Chlorpyrifos Methyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Chlorpyrifos Methyl is the USEPA Aquatic Life Benchmark of 0.085 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
100755
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Chromium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Ninety two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 540 samples exceed the COLD objective for the dissolved fraction in water. Zero of the 443 samples exceed the MUN objective for the dissolved fraction in water. Zero of the 540 samples exceed the WARM objective for the dissolved fraction in water. Nine of the 491 samples exceed the MUN objective for the total fraction in water.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of the 540 samples exceed the COLD objective for the dissolved fraction in water and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Zero of the 443 samples exceed the MUN objective for the dissolved fraction in water and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Zero of the 540 samples exceed the WARM objective for the dissolved fraction in water and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Nine of the 491 samples exceed the MUN objective for the total fraction in water and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113005
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102523
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106174
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119406
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106188
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 13 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117203
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 13 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122667
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Chromium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120269
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102542
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122655
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Chromium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119170
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122656
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Chromium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106173
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41174
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Chromium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112993
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119834
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110998
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106273
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112998
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117171
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111284
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111291
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119845
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106268
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119821
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113094
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110963
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119127
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106301
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102633
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106288
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119554
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110996
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110242
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106295
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102593
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113061
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119876
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119839
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110974
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117162
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111013
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112995
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110997
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119837
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113092
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117175
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106266
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102499
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110977
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106248
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119822
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118671
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111288
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106208
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118452
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119823
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118430
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114426
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110243
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113066
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114341
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119856
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121866
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Chromium .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for chromium in 111 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121869
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Chromium .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for chromium in 111 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 33957
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for chromium III or the criteria for chromium VI.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each chromium III sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion. The criterion continuous concentration (4-day average) to protect aquatic life in freshwater for chromium VI is 11 ug/L and is not hardness dependent.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios)
Temporal Representation: Samples collected between 11/13/07 and 7/15/08.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106176
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117150
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119165
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119865
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119536
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112999
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118767
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119410
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102556
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119533
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106321
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105367
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119867
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102534
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for chromium 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111221
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110961
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112600
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117166
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119848
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119129
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111268
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114430
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102590
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112972
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110241
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111209
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112987
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113784
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119872
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106297
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110975
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106240
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100755, Chromium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113223
 
Pollutant: Chromium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Chromium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104204
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Cobalt
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Forty lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the AGR beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the AGR beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107109
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119813
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112924
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112944
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112943
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107098
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117207
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111241
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107019
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119433
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102696
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107104
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111240
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107012
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119429
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112918
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105487
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112937
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107100
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107108
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119815
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117155
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119443
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102577
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117186
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106236
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106230
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117182
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111279
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102578
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114361
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119809
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110950
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119452
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102489
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114363
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106219
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111274
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119486
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104204, Cobalt
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107069
 
Pollutant: Cobalt
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Cobalt.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. A .05 mg/L criteria is the recommended maximum concentration of cobalt in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
100690
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Copper
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

59 lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of 446 samples exceeded the MUN beneficial use in water as a dissolved fraction and zero of 491 samples exceeded the objective for the protection of the MUN beneficial use for water as a total fraction, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103974
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104496
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122314
 
Pollutant: Copper
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for copper in 149 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122242
 
Pollutant: Copper
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Copper .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for copper in 149 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32860
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for copper.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110777
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112965
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119559
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114423
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111001
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106270
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113079
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103572
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108922
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111208
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106202
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119535
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102639
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106290
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114420
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110799
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119558
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114435
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113200
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122682
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Copper, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112978
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111000
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122694
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Copper, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112248
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113107
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41208
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Copper.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106286
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122695
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Copper, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112890
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114437
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102628
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119577
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106243
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119552
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114385
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102610
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105509
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113093
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114415
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102543
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102461
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119459
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119525
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102459
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113055
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114378
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102561
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113116
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117204
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119518
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119770
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114654
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111980
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104494
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106267
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119474
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114390
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102508
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110983
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119468
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102484
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114397
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102467
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113084
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104495
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113122
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114402
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102620
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113085
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119441
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119565
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119472
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119122
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113213
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102513
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Copper.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A copper is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102481
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112982
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102573
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113081
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113088
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114389
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114404
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119462
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102609
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119464
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102471
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107042
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113095
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106265
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102479
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113127
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117156
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107136
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100690, Copper
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113121
 
Pollutant: Copper
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Copper. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
103549
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Demeton
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103549, Demeton
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117642
 
Pollutant: Demeton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Demeton, Total.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Demeton, calculated using the IRIS Reference Dose, is 0.3 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.00004 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103549, Demeton
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122725
 
Pollutant: Demeton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Demeton-s, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103549, Demeton
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122724
 
Pollutant: Demeton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Demeton-s, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103549, Demeton
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117643
 
Pollutant: Diazinon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Diazinon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The freshwater chronic value for diazinon is 0.1 ug/L, expressed as a continuous concentration (Finlayson, 2004).
Guideline Reference: Water quality for diazinon. Memorandum to J. Karkoski, Central Valley RWQCB. Rancho Cordova, CA: Pesticide Investigation Unit, CA Department of Fish and Game
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103645
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Dieldrin
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117646
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dieldrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for dieldrin to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.056 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122749
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dieldrin, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for dieldrin to protect human health from the consumption of water and organisms is 0.00014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122738
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dieldrin, Total. Nine sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for dieldrin to protect human health from the consumption of water and organisms is 0.00014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101492
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for dieldrin to protection of human health from consumption of organisms only is 0.00014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121291
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Dieldrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Dieldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121311
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Waterboard staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: Zero of Zero samples exceeded the water quality standard for Dieldrin. Although data was collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite), all 1 sample(s) had to be thrown out due to quantitation issues.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for dieldrin in fish tissue is 0.32 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121450
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Dieldrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Dieldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103645, Dieldrin
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101493
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Dieldrin. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for dieldrin to protect human health from the consumption of water and organisms is 0.00014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104164
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Dimethoate
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104164, Dimethoate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122750
 
Pollutant: Dimethoate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dimethoate, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104164, Dimethoate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122751
 
Pollutant: Dimethoate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dimethoate, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104164, Dimethoate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117647
 
Pollutant: Dimethoate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dimethoate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104164, Dimethoate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117648
 
Pollutant: Dimethoate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dimethoate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Dimethoate is the USEPA Aquatic Life Benchmark of 0.5 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104324
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Endrin Ketone
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Twp lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104324, Endrin Ketone
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122763
 
Pollutant: Endrin Ketone
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Endrin Ketone, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin to protect of human health from the consumption of water and organisms is 0.76 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104324, Endrin Ketone
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122762
 
Pollutant: Endrin Ketone
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceed the criterion for Endrin Ketone, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin to protect of human health from the consumption of water and organisms is 0.76 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
103359
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Fenthion
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103359, Fenthion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122616
 
Pollutant: Fenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenthion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103359, Fenthion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118233
 
Pollutant: Fenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenthion. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103359, Fenthion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114570
 
Pollutant: Fenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Fenthion. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenthion is the USEPA Aquatic Life Benchmark of 0.013 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103359, Fenthion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122608
 
Pollutant: Fenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenthion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
104349
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Lead
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Seventy-nine lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the COLD, WARM, and MUN beneficial uses.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the COLD, WARM, and MUN beneficial uses and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102630
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117698
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105511
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2011-10-05
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107039
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2012-10-22 and 2012-10-22
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119819
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2011-10-05
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105506
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2012-10-22 and 2012-10-22
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105512
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2011-04-14 and 2011-04-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107070
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2012-10-22 and 2012-10-22
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113063
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2012-10-22 and 2012-10-22
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111218
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118408
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102683
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119415
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118517
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117699
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119178
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112904
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119180
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105454
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111253
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105486
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106179
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105488
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119485
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119399
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119403
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103772
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102591
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105516
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2011-10-05
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107048
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107576
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108944
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105531
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122631
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Lead, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113080
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-02-29
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113076
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105527
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-01-19
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112979
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107564
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105529
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122629
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Lead, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107057
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2012-05-15 and 2012-05-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105518
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-10-22
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102692
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119401
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107105
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107143
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105467
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102685
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122025
 
Pollutant: Lead
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for lead in 128 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122245
 
Pollutant: Lead
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Lead .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for lead in 128 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122630
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Lead, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107055
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2012-01-19 and 2012-11-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113117
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2011-10-05
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114393
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2011-03-15 and 2011-03-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42279
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Lead.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of values listed in Table 3-2 of the Basin Plan. The value for lead is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117869
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112933
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102678
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111256
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112906
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114450
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107016
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119574
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117697
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107101
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102517
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119414
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107011
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114333
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113009
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117206
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114328
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118441
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114448
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106319
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118528
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Lead.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119493
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104349, Lead
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112905
 
Pollutant: Lead
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Lead. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
79868
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Manganese
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Five lines of evidence are available in the administrative record to assess this pollutant. One of the seven samples exceed the MUN objective for total manganese in water.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of the seven samples exceeded the MUN objective for total manganese in water and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 79868, Manganese
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109029
 
Pollutant: Manganese
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Manganese.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79868, Manganese
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104986
 
Pollutant: Manganese
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Manganese.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79868, Manganese
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102183
 
Pollutant: Manganese
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Manganese.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79868, Manganese
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42794
 
Pollutant: Manganese
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Manganese.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79868, Manganese
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102160
 
Pollutant: Manganese
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Manganese.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Manganese is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
100680
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Mercury
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.11 of the Listing Policy. Under section 3.11 a single line of evidence is necessary to assess listing status.

One hundred and thirty-five lines of evidence are available in the administrative record to assess this pollutant. Zero of the 334 samples exceed the objective for COLD, COMM, and MUN in the dissolved fraction in water. Zero of the 334 samples exceed the objective for COLD in the dissolved fraction in water. One of the 334 samples exceed the objective for COMM and MUN in the total fraction in water. Zero of one sample exceeded the objective for COLD and WARM in sediment.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of the 334 samples exceed the objective for the dissolved fraction in water (COLD, COMM, and MUN). Zero of the 334 samples exceed the objective dissolved fraction in water (COLD). One of the 334 samples exceed the objective in the total fraction in water (COMM and MUN). Zero of one sample exceeded the objective in sediment (COLD and WARM). A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119154
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119171
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119159
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113120
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102667
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102621
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119177
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119864
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114416
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117160
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119808
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114454
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114403
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106225
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106272
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107025
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106237
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42778
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to Total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109194
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119568
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117129
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119817
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119833
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2011-07-13 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119205
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117140
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106261
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 10
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111236
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107150
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114408
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111257
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112976
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107054
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110971
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114126
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106231
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 21
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119126
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113058
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 21
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107587
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111258
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119842
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119445
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110941
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42690
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117125
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2011-07-13 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106241
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102476
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112700
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119207
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110966
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2011-07-13 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122646
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Mercury, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106276
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122645
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Mercury, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105494
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102613
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106232
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114643
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114381
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110947
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107141
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112722
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122644
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Mercury, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110943
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102694
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107056
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42741
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Mercury.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106263
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106246
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110987
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106254
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114401
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112711
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117139
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 10
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111262
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112895
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 20 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107077
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114417
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119161
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114335
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113124
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107081
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102502
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114428
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105540
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119174
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119873
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113129
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119124
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112921
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105455
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102488
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113002
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102450
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119183
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114419
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102548
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106291
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119167
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102682
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106280
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107064
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106192
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111214
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of organisms only is 0.051 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112923
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119149
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119172
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 10
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106175
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117165
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 23 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111280
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107154
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111224
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102626
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106203
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 22
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 22 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117195
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 15
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119179
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102681
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117159
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119123
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119861
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112888
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 27
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117183
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107111
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 25
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 25 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102674
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for mercury to protect of human health from the consumption of water and organisms is 0.050 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121893
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Mercury .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for mercury in 1.06 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121895
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Mercury .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for mercury in 1.06 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112667
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106224
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 7
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 7 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2011-10-11 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110953
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 21
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 21 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-11-17 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107015
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112689
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102472
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119431
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102661
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106251
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102601
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112996
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2011-10-05 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112922
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100680, Mercury
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114382
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Mercury.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Recommended Water Quality Criteria Continuous Concentrations (4-day average concentrations) for freshwater aquatic organisms exposure to total mercury is 0.77 ug/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-11-16 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
103150
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Methidathion
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103150, Methidathion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118161
 
Pollutant: Methidathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methidathion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103150, Methidathion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118160
 
Pollutant: Methidathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methidathion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methidathion is the USEPA Aquatic Life Benchmark of 0.66 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103150, Methidathion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122670
 
Pollutant: Methidathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Methidathion, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for methoxychlor is 0.03 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 103150, Methidathion
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122659
 
Pollutant: Methidathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceed the criterion for Methidathion, Total. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for methoxychlor is 0.03 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
103320
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Methomyl
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None samples exceed the objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103320, Methomyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118165
 
Pollutant: Methomyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methomyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103320, Methomyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118166
 
Pollutant: Methomyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methomyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for methomyl is 180 µg/L.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103320, Methomyl
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118167
 
Pollutant: Methomyl
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methomyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methomyl is the USEPA Aquatic Life Benchmark of 0.7 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104986
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Molybdenum
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the Section 303(d) List under Section 3.1 of the Listing Policy. Under Section 3.1, a single line of evidence is necessary to assess listing status.

Forty lines of evidence are available to assess protection of the municipal and domestic supply (MUN) beneficial use. Forty lines of evidence are available to assess protection of the Agricultural Supply (AGR) beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category (i.e., sufficient justification to not list). This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of Section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of Section 6.1.5 of the Policy. (3) The method detection limit for all samples was greater than the criteria. Thus, per the Listing Policy the data were not used in this assessment. Therefore, there are no data available to assess against protection of the MUN and AGR beneficial uses. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105453
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111290
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112915
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119871
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107130
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106300
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111025
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117202
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111008
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110956
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119854
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119465
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119849
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107050
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119475
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119868
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111232
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111285
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111026
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106314
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117154
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119835
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102622
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107020
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119162
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106298
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111292
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119136
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111275
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117198
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107041
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106296
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117174
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117144
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111010
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111278
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117178
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111228
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111234
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112948
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102664
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117187
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117132
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111287
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111005
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112941
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111212
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117130
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102666
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107072
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111276
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107123
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117142
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112935
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111014
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107033
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106213
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112898
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117133
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105532
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119879
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110954
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110986
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117164
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107035
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117127
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114453
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107115
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119816
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119480
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111016
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102625
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111283
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107153
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110989
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110967
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113004
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112910
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113040
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.01 mg/L criteria is the recommended maximum concentration of molybdenum in irrigation water.
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104986, Molybdenum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117194
 
Pollutant: Molybdenum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Molybdenum. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EPA Drinking Water Lifetime Health advisory level for Molybdenum is 0.04 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
100720
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Nickel
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Multiple lines of evidence are available in the administrative record to assess this pollutant.

None of the samples exceed the objective for the COLD, COMM, and WARM beneficial use(s).
Two of four-hundred and sixteen samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the COLD, COMM, and WARM beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Two of four-hundred and sixteen samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112931
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119521
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114331
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114384
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106304
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114346
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119546
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113207
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105490
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118616
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102602
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111226
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105459
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122302
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Nickel .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for nickel in 48.6 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121688
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 1 of the 1 samples exceeded the evaluation guideline for Nickel .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for nickel in 48.6 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32862
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112973
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111235
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102638
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117176
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111266
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111360
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117145
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112967
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113196
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119549
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113022
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105457
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102565
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102514
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113071
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102688
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119188
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105520
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119430
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105481
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119528
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113220
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102570
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110946
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106306
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105515
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119168
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112899
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114356
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118173
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114329
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107107
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114347
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118176
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113028
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119569
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119413
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106215
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113051
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112984
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111246
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106209
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113036
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106204
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105472
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102475
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110942
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119524
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102501
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115228
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102571
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113025
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114380
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112889
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111273
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119831
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119506
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114377
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119499
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119505
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118177
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105479
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118174
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102453
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104629
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119466
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106178
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114379
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119563
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114344
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113023
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112985
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119538
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119181
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118723
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114370
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102464
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102468
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119567
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107046
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105492
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120235
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102462
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115183
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119510
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107013
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102600
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102587
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106913
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102627
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113077
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104103
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102500
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105534
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113087
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113110
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107093
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113112
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102618
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 42983
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4.6 mg/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106278
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for Nickel to protect human health from consumption of organisms only is 4600 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119550
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114440
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 18
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project ? Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114446
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 18
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 18 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project ? Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114438
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 16
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 16 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project ? Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113091
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119121
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122700
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Nickel, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114439
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102558
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112437
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119572
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122699
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Nickel, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106289
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113115
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113100
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102497
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 35 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114436
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113102
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102493
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113104
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112971
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104136
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114443
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115272
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43131
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nickel.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122701
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Nickel, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference: Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 100720, Nickel
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114413
 
Pollutant: Nickel
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Nickel.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nickel is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
79016
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant.
None of the 469 samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the 469 samples exceed the objective for the MUN beneficial use(s) and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119517
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 49
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 49 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101451
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2012-07-19
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119503
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 57
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 57 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-10-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103459
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105461
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 50
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 50 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112193
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0110)
Temporal Representation: The samples were collected between the dates of 2014-06-09 and 2014-06-09
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43966
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nitrate+nitrite (sum as nitrogen) is 10.0 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43030
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nitrate/Nitrite as N.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for nitrate+nitrite (sum as nitrogen) is 10.0 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108053
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0007)
Temporal Representation: The samples were collected between the dates of 2011-07-11 and 2011-07-11
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102670
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108064
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112463
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Perennial Stream Surveys data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0160)
Temporal Representation: The samples were collected between the dates of 2011-07-25 and 2011-07-25
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117950
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105460
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 50
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 50 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113015
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 36
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 36 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119580
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109724
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111438
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110788
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106320
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113007
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 45
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 45 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79016, Nitrate/Nitrite (Nitrite + Nitrate as N)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119409
 
Pollutant: Nitrate/Nitrite (Nitrite + Nitrate as N)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 48
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 48 samples exceeded the water quality standard for Nitrate + Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
104325
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Nitrogen, Nitrate
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Fourteen lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107110
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107092
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 64
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 64 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-10-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117210
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 55
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 55 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109505
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119424
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 38
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 38 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111251
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 56
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 56 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119184
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 49
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 49 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102687
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111248
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 54
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 54 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119420
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 57
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 57 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111416
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117880
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103828
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104325, Nitrogen, Nitrate
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119418
 
Pollutant: Nitrogen, Nitrate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Nitrate as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Water Quality Control Plan, North Coast Basin is 10.0 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
79031
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Nitrogen, Nitrite
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Sixteen lines of evidence are available in the administrative record to assess this pollutant.

None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 44008
 
Pollutant: Nitrite as Nitrite NO2
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Nitrite as N.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113489
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119200
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 64
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 64 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-10-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102700
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114353
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 49
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 49 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105484
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 46
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 46 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105493
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102567
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 38
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 38 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2014-05-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105491
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 57
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 57 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106223
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 56
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 56 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119804
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 55
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 55 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106222
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 54
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 54 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2014-06-18
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116400
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109749
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109517
 
Pollutant: Nitrogen, Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Nitrite as N.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 79031, Nitrogen, Nitrite
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43134
 
Pollutant: Nitrite as Nitrite NO2
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Nitrite as N.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for Nitrite as N is 1.0 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
 
DECISION ID
78241
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Oxygen, Dissolved
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under this section of the policy, a minimum of one line of evidence is needed to assess listing status. Eighteen lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of 6 samples from the mainstem Eel River, two of two samples from Outlet Creek, zero of 4 samples from Blue Slides Ck. and Bucknell Creek, and zero of 1 sample from Rattlesnake creek, Horse Creek, Corbin Creek, Bear Creek, Cold Creek, Thistle Glade Creek, Rice Creek, Trout Creek, and Panther Creek exceeded the objective for the protection of COLD. These sample sizes are insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples is needed to determine if a beneficial use is fully supported using table 3.2.
(4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101341
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: If DO concentrations fall below the numeric objectives set forth by the Basin Plan (2018). If NO, then the waterbody is supporting that beneficial use, if YES, then that waterbody is considered impaired.
Data Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Dissolved oxygen (DO) concentrations shall conform to the numeric objectives expressed in section 3.3.5.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: EVIDENCE OF SALMONID PRESENCE & LIFE CYCLE USE: Coho, steelhead, and Chinook are present in the watershed (USEPA 2004). Rearing occurs year round and spawning/ incubation/ emergence occurs from November to June (Busby et al. 1996; CDFG 2004; Myers et al. 1998). Non-core rearing occurs in the mainstem Upper Main Eel River, while core rearing occurs in tributaries to the Upper Main.
Guideline Reference: Status Review of West Coast Steelhead from Washington, Idaho, Oregon, and California
Guideline Reference: Status Review of Chinook Salmon from Washington, Idaho, Oregon, and California.
Guideline Reference: Recovery Strategy for California Coho Salmon: Report to the California Fish and Game Commission
 
Spatial Representation: Information pertains to the Eel River HU, Upper Main HA (Includes Tomki Creek)
Temporal Representation: Data are reflective of current conditions in this water body.
Environmental Conditions:
QAPP Information: Information is considered to be of adequate quality for the Integrated Report process.
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34106
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Zero of the 4 samples exceeded the objective.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The site specific objective for the Eel River HU is a minimum value of 7.0 mg/L. In addition, the 90% lower limit for this pollutant is 7.5 mg/L. Therefore, 90% of the values in a calendar year must be lower than this limit. Lastly, the site specific objective of 50% lower limit of 10 mg/L which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected approximately once per quarter year from November 2007 to July 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101084
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 10.1 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rice Creek ~0.5mi above Rice Fork (111PS0110).
Temporal Representation: The samples were collected between the dates of 6/9/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101063
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.0 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Horse Creek above Eel River (111HSCAER).
Temporal Representation: The samples were collected between the dates of 7/26/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101228
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for dissolved oxygen. Data range from 11.1 - 14.0 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 11/7/2013 - 12/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101266
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for dissolved oxygen. Data range from 11.1 - 14.0 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bucknell Creek above Eel River (111BN0329).
Temporal Representation: The samples were collected between the dates of 11/7/2103 - 12/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101065
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 9.9 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Thistle Glade Creek ~1mi above Eel River (111TGCAER).
Temporal Representation: The samples were collected between the dates of 7/24/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101060
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 7.8 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Cold Creek above Eel River (111FS0007).
Temporal Representation: The samples were collected between the dates of 7/11/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101058
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.5 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Bear Creek ~1.2mi above Blue Slides Cr. (111FS0001).
Temporal Representation: The samples were collected between the dates of 7/5/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101059
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.1 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 7/6/2011 - 7/19/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101083
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for dissolved oxygen. Data range from 9.4 - 9.9 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Blue Slides Creek above Bear Cr. (111FS0008).
Temporal Representation: The samples were collected between the dates of 5/2/2012 - 6/7/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101064
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.1 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Rattlesnake Creek ~0.5mi above Eel River (111WER008).
Temporal Representation: The samples were collected between the dates of 7/23/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101061
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 9.9 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s)Corbin Creek ~0.1mi abive Eel River (111CBCAER).
Temporal Representation: The samples were collected between the dates of 8/8/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101085
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.0 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Trout Creek ~0.1mi above Eel River (111WER003).
Temporal Representation: The samples were collected between the dates of 6/10/2014.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101062
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 8.6 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.4mi above Trout Cr. (111ERATRC).
Temporal Representation: The samples were collected between the dates of 10/10/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101086
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
Aquatic Life Use: Fish Spawning
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 18.2 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for SPAWN beneficial use waters to be a daily minimum of 9.0 mg/L and a 7-day moving average of 11.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.75 miles above Wesley Ives Creek (111WE0816).
Temporal Representation: The samples were collected between the dates of 6/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 33874
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Two of the 2 samples collected exceeded the objective.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for Outlet Creek is a minimum value of 7.0 mg/L. In addition, the 90% lower limit for this pollutant is 7.5 mg/L. Therefore, 90% of the values in a calendar year must be lower than this limit. Lastly, the site specific objective of 50% lower limit of 10 mg/L which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Outlet Creek station (111PS0008).
Temporal Representation: Two samples were collected in September 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78241, Oxygen, Dissolved
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100975
 
Pollutant: Oxygen, Dissolved
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for dissolved oxygen. Data range from 9.0 mg/L.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states: Dissolved oxygen concentrations shall conform to those limits listed in Section 3.3.5. Section 3.3.5 lists dissolved oxygen concentration limits for COLD beneficial use waters to be a daily minimum of 6.0 mg/L and a 7-day moving average of 8.0 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Panther Creek ~2.6mi above Welch Cr. (111PS0160).
Temporal Representation: The samples were collected between the dates of 7/25/2011.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
72754
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: PCBs (Polychlorinated biphenyls)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Three lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 72754, PCBs (Polychlorinated biphenyls)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109538
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for PCBs (Polychlorinated biphenyls).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The total PCB Congeners criterion for the protection of human health from consumption of organisms only is 0.00017 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72754, PCBs (Polychlorinated biphenyls)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25465
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 550
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 550 polychlorinated biphenyl (PCB) analytes collected in the upper mainstem Eel River exceed the evaluation guideline. Each of the 11 samples were analyzed for 50 PCB cogeners. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007, p. 3-4.00): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per the "Public Health Goal for Water Soluble Polychlorinated Biphenyls Expected to Found in Drinking Water" (OEHHA 2007): The health-protective concentration of water-soluble PCBs in
drinking water associated with a one in one million extra lifetime cancer risk is 0.09 ug/L.
Guideline Reference: Public Health Goal for Water Soluble Polychlorinated Biphenyls Expected to Be Found in Drinking Water. Pesticide and Environmental Toxicology Branch, Office of Environmental Health Hazard Assessment, California Environmental Protection Agency
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 2 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), and (2) near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. Site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 72754, PCBs (Polychlorinated biphenyls)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109539
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for PCBs (Polychlorinated biphenyls).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The total PCB Congeners criterion for the protection of human health from consumption of water and organisms is 0.00017 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
76777
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Pesticides
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: These pollutants are being considered for placement on the Section 303(d) List under Section 3.1 of the Listing Policy. Under Section 3.1, a single line of evidence is necessary to assess listing status.
At least one line of evidence is available for each pollutant evaluated in this decision. Data were evaluated to determine protection of the following beneficial uses: COLD, MUN, WARM, and COMM.
None of the water and sediment samples exceed the objectives for the protection of COLD, MUN, WARM, and COMM.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objectives for COLD, MUN, WARM, and COMM. Additionally, the sample size for each pesticide is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating as a minimum of 16 samples is needed to determine if each beneficial use is fully supported using table 3.1.
4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122723
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDE(o,p'), Total. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101948
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDE criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101949
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDE(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDE criterion for the protection of human health from the consumption of water and organisms is 0.00059 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109233
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDT criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 0.001 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107636
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDT criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109234
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDT(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDT criterion for the protection of human health from the consumption of water and organisms is 0.00059 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121383
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for endrin in fish tissue is 660 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; USEPA, 2000)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117668
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.036 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117667
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin to protect human health from consumption of organisms only is 0.81ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117669
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin to protect of human health from the consumption of water and organisms is 0.76 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117664
 
Pollutant: Endrin aldehyde
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endrin Aldehyde.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin aldehyde to protect human health from consumption of organisms only is 0.81ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117665
 
Pollutant: Endrin aldehyde
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endrin Aldehyde.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for endrin aldehyde to protect of human health from the consumption of water and organisms is 0.76 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117670
 
Pollutant: Esfenvalerate/Fenvalerate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Esfenvalerate/Fenvalerate, Total.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Esfenvalerate/Fenvalerate, Total is the USEPA Aquatic Life Benchmark of 0.017 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117671
 
Pollutant: Esfenvalerate/Fenvalerate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Esfenvalerate/Fenvalerate, Total.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Esfenvalerate/Fenvalerate, Total is the USEPA Aquatic Life Benchmark of 0.017 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122563
 
Pollutant: Ethion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ethion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122764
 
Pollutant: Ethion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ethion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106579
 
Pollutant: Ethion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Ethion. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA National Recommended Water Quality Criteria (1972) for the protection of freshwater aquatic life from Ethion is a concentration of 0.02 ug/l.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117672
 
Pollutant: Ethion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Ethion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Ethion, calculated using the IRIS Reference Dose, is 3.5 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.0005 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114913
 
Pollutant: Ethion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Ethion. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA National Recommended Water Quality Criteria (1972) for the protection of freshwater aquatic life from Ethion is a concentration of 0.02 ug/l.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122564
 
Pollutant: Ethoprop
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ethoprop, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122565
 
Pollutant: Ethoprop
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ethoprop, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117673
 
Pollutant: Ethoprop
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Ethoprop.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117674
 
Pollutant: Ethoprop
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Ethoprop.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Ethoprop is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122578
 
Pollutant: Famphur
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Famphur , Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122579
 
Pollutant: Famphur
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Famphur , Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122607
 
Pollutant: Fensulfothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fensulfothion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117681
 
Pollutant: Glyphosate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Glyphosate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Glyphosate is the USEPA Aquatic Life Benchmark of 11900 ug/L for a vascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117682
 
Pollutant: Glyphosate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Glyphosate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for glyphosate is 700 ug/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117683
 
Pollutant: Glyphosate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Glyphosate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Glyphosate is the USEPA Aquatic Life Benchmark of 11900 ug/L for a vascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121207
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Heptachlor. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121208
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Heptachlor. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117694
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Heptachlor.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor to protect aquatic life in freshwater criterion continuous concentration (expressed as a 4-day average) is 0.0038 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105778
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor to protect human health from consumption of organisms only is 0.00021 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108823
 
Pollutant: Heptachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor to protect of human health from the consumption of water and organisms is 0.00021 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121484
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Heptachlor Epoxide. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor Epoxide concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 30114
 
Pollutant: Aldrin | Atrazine | Carbofuran | Chlordane | Chlorpyrifos | Dacthal | Dieldrin | Endrin | Glyphosate | Heptachlor | Heptachlor epoxide | Hexachlorobenzene/ HCB | Hexachlorocyclohexane (HCH), alpha | Hexachlorocyclohexane (HCH), beta | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Methoxychlor | Molinate | Simazine | Thiobencarb/Bolero | Toxaphene
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 967
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 967 pesticide samples collected in the upper mainstem Eel River exceed the objective as all of the samples were either measured as non-detect or were measured as detected but not quantified with reporting limits below objectives or evaluation guidelines. The samples were analyzed for 93 pesticides, pesticide constituents, isomers, or metabolites. For each of the 93 pesticide analytes, 1 to 9 samples were collected. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
No evaluation guidelines for the dissolved fractions of the pesticides assessed for this waterbody for the Municipal & Domestic Supply beneficial use could be found that meet the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Hexachlorocyclohexane, alpha (0.0026 ug/l)
Hexachlorocyclohexane, beta (0.0091ug/l)
Aldrin (0.000049 ug/l)
Atrazine (0.001 ug/l)
Carbofuran (0.04 mg/l)
Chlordane (0.0001 ug/l)
Chlorpyrifos (0.083 ug/l)
Dacthal (70 ug/l)
Dieldrin (0.00014 ug/l)
Endrin (0.002 ug/l)
Glyphosate (700 ug/l)
Heptachlor (0.01 ug/l)
Heptachlor epoxide (0.01 ug/l)
Hexachlorobenzene/ HCB (0.001 ug/l)
Lindane/gamma Hexachlorocyclohexane (gamma-HCH) (.98 ug/l)
Methoxychlor (0.03 mg/l)
Molinate (0.02 mg/l)
Simazine (0.04 mg/l)
Thiobencarb/Bolero (0.07 mg/l)
Toxaphene (0.003 mg/l)
Guideline Reference: National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Guideline Reference: California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 2 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), and (2) near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 29807
 
Pollutant: Azinphos, Ethyl (Ethyl Guthion) | Bolstar | Carbofuran | Chlorothalonil | Chlorpyrifos, methyl | Ciodrin | Demeton s | Dichlofenthion | Dichlorvos | Dimethoate | Dioxathion | Dyfonate (Fonofos or Fonophos) | Endrin Ketone | Ethion | Ethoprop | Famphur | Fenchlorphos | Fenitrothion | Fensulfothion | Fenthion | Leptophos | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Merphos | Methidathion | Methyl Parathion | Mevinphos | Naled | Oxadiazon | Oxychlordane | Phorate | Phosmet | Phosphamidon | Prometon (Prometone) | Prometryn | Propazine | Secbumeton | Simetryn | Sulfotep | Tedion | Terbufos | Terbuthylazine | Terbutryn | Tetrachlorvinphos | Thiobencarb/Bolero | Thionazin | Tokuthion | Trichlorfon | Trichloronate | beta-BHC (Benzenehexachloride or beta-HCH) | cis-Nonachlor | delta-BHC (Benzenehexachloride or delta-HCH) | o,p'-DDD (Dichlorodiphenyldichloroethane)) | o,p'-DDE (Dichlorodiphenyldichloroethylene) | p,p'-DDD (Dichlorodiphenyldichloroethane) | p,p'-DDE | p,p'-DDMU | trans-Nonachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 967
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 967 pesticide samples collected in the upper mainstem Eel River exceed the objective as all of the samples were either measured as non-detect or were measured as detected but not quantified with reporting limits below objectives or evaluation guidelines. The samples were analyzed for 93 pesticides, pesticide constituents, isomers, or metabolites. For each of the 93 pesticide analytes, 1 to 9 samples were collected. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
No evaluation guidelines for the dissolved fractions of the pesticides assessed for this waterbody for the Municipal & Domestic Supply beneficial use could be found that meet the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 2 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), and (2) near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122639
 
Pollutant: Bolstar
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Bolstar, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122628
 
Pollutant: Bolstar
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Bolstar, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110221
 
Pollutant: Carbofuran
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Carbofuran.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for Carbofuran incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.018 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109028
 
Pollutant: Linuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Linuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Linuron is the USEPA Aquatic Life Benchmark of 0.09 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114026
 
Pollutant: Malathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion, does not exceed 0.028 ug/L more than once every three years on the average (UC Davis Aquatic Life Criterion).
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102266
 
Pollutant: Malathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Malathion. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Aquatic life should not be affected unacceptably if the 4-day average concentration of Malathion, does not exceed 0.028 ug/L more than once every three years on the average (UC Davis Aquatic Life Criterion).
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: l. Organophosphate insecticides. Reviews of Environmental Contamination and Toxicology 216:1-48.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118162
 
Pollutant: Methiocarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methiocarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methiocarb is the USEPA Aquatic Life Benchmark of 2.75 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118163
 
Pollutant: Methiocarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methiocarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Methiocarb is the USEPA Aquatic Life Benchmark of 2.75 ug/L for an invertebrate (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118168
 
Pollutant: Methoxychlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methoxychlor.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA national ambient water quality criterion for freshwater aquatic life Criterion Continuous Concentration (CCC) expressed as a 4-day average for methoxychlor is 0.03 µg/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118169
 
Pollutant: Methoxychlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Methoxychlor.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for methoxychlor is 0.03 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113360
 
Pollutant: Methyl Parathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Parathion, Methyl. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The California Department of Fish and Game instantaneous criteria for Methyl Parathion is 0.08 ug/L.
Guideline Reference: Hazard Assessment of the Insecticide Methyl Parathion to Aquatic Organisms in the Sacramento River System
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109537
 
Pollutant: Methyl Parathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Parathion, Methyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Health Advisory for lifetime exposure to Parathion, Methyl as a drinking water level is a concentration of 0.001 mg/L
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122672
 
Pollutant: Mevinphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Mevinphos, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122671
 
Pollutant: Mevinphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Mevinphos, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121200
 
Pollutant: Mirex
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Waterboard staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: Zero of Zero samples exceeded the water quality standard for Mirex. Although data was collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite), all 1 sample(s) had to be thrown out due to quantitation issues.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for mirex in fish tissue is 0.28 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 1992)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Expedited Cancer Potency Values and Proposed Regulatory Levels for Certain Proposition 65 Carcinogens.
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106347
 
Pollutant: Mirex
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Mirex. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The criterion continuous concentration from the USEPA national ambient water quality criterion for the protection of freshwater aquatic life for mirex is 0.001 µg/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122684
 
Pollutant: Molinate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Molinate, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for molinate is 0.02 mg/L
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122683
 
Pollutant: Molinate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Molinate, Total. Nine sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for molinate is 0.02 mg/L
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118170
 
Pollutant: Molinate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Molinate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Molinate is the USEPA Aquatic Life Benchmark of 105 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118171
 
Pollutant: Molinate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Molinate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for molinate is 0.02 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118172
 
Pollutant: Molinate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Molinate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Molinate is the USEPA Aquatic Life Benchmark of 105 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122698
 
Pollutant: Naled
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Naled, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122685
 
Pollutant: Naled
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Naled, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122713
 
Pollutant: Oxadiazon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Oxadiazon, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122714
 
Pollutant: Oxadiazon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Oxadiazon, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109533
 
Pollutant: Oxadiazon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Oxadiazon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Oxadiazon is the USEPA Aquatic Life Benchmark of 5.2 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109534
 
Pollutant: Oxadiazon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Oxadiazon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Oxdiazon, calculated using the IRIS Reference Dose, is 35 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.005 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109535
 
Pollutant: Oxadiazon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Oxadiazon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Oxadiazon is the USEPA Aquatic Life Benchmark of 5.2 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109536
 
Pollutant: Oxamyl (Vydate)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Oxamyl.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for Oxamyl incorporated by reference in the Water Quality Control Plan, North Coast Basin is 50 ug/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121076
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Total Chlordanes. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum total Chlordane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121075
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Total Chlordanes. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for total chlordane in fish tissue is 3.9 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121078
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Total Chlordanes. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum total Chlordane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105195
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Total Chlordanes.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Chlordane criterion continuous concentration expressed as a 4-day average for the protection of aquatic life in california waters is 0.0043 ug/L (California Toxics Rule, 2000)
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105197
 
Pollutant: Chlordane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Total Chlordanes.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The chlordane criterion for the protection of human health from the consumption of water and organisms is 0.00057 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106410
 
Pollutant: Chlorpyrifos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Chlorpyrifos. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The freshwater criterion continuous concentration to protect aquatic organisms is 0.014 ug/L (Siepmann and Finlayson 2000).
Guideline Reference: Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110240
 
Pollutant: Chlorpyrifos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Chlorpyrifos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA drinking water health advisory for chlorpyrifos is 2 µg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116802
 
Pollutant: Cinerin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Cinerin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Cinerin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Cinerin-1, and Cinerin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116803
 
Pollutant: Cinerin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Cinerin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Cinerin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Cinerin-1, and Cinerin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122668
 
Pollutant: Ciodrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ciodrin, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122669
 
Pollutant: Ciodrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Ciodrin, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118079
 
Pollutant: Coumaphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Coumaphos. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Coumaphos is the USEPA Aquatic Life Benchmark of 0.0337 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118080
 
Pollutant: Coumaphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Coumaphos. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Coumaphos is the USEPA Aquatic Life Benchmark of 0.0337 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117636
 
Pollutant: Cyanazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Cyanazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA drinking water lifetime health advisory for cyanazine is 1 µg/L. The Lifetime HA is based on exposure of a 70-kg adult consuming 2 liters of a water a day.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118255
 
Pollutant: Cyfluthrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyfluthrin, total. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of Cyfluthrin does not exceed 0.00005 ug/L.
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111188
 
Pollutant: Cyhalothrin, Lambda
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda-. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of lambda-cyhalothrin does not exceed 0.0005 ug/L. Mixtures of lambda-cyhalothrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113979
 
Pollutant: Cyhalothrin, Lambda
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cyhalothrin, Total lambda-. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: UC Davis Aquatic Life Criteria: Aquatic life should not be affected unacceptably if the 4-day average concentration of lambda-cyhalothrin does not exceed 0.0005 ug/L. Mixtures of lambda-cyhalothrin and other pyrethroids should be considered in an additive manner. (Fojut et al. 2012)
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108772
 
Pollutant: Cypermethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Cypermethrin, Total. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The interim freshwater criterion maximum concentration is 0.002 ug/L (DFG 00-6, 2000).
Guideline Reference: Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122710
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDD(o,p'), Total. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122711
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDD(o,p'), Total. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108637
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDD criterion for the protection of human health from consumption of organisms only is 0.00084 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116840
 
Pollutant: DDD (Dichlorodiphenyldichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for DDD(p,p'). Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The 4,4'-DDD criterion for the protection of human health from the consumption of water and organisms is 0.00083 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122712
 
Pollutant: DDE (Dichlorodiphenyldichloroethylene)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDE(o,p'), Total. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122741
 
Pollutant: Phosmet
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Phosmet, Total. Eighteen sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109544
 
Pollutant: Phosmet
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Phosmet.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109545
 
Pollutant: Phosmet
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Phosmet.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Phosmet is the USEPA Aquatic Life Benchmark of 0.8 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122697
 
Pollutant: Dacthal
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dacthal, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. USEPA's Lifetime Health advisory level for Dacthal is 0.07 mg/L as stated on page 3 of the 2011 edition of the drinking water standards and health advisories.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: 2011 Edition of the Drinking Water Standards and Health Advisories
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122696
 
Pollutant: Dacthal
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dacthal, Total. Nine sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. USEPA's Lifetime Health advisory level for Dacthal is 0.07 mg/L as stated on page 3 of the 2011 edition of the drinking water standards and health advisories.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: 2011 Edition of the Drinking Water Standards and Health Advisories
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117637
 
Pollutant: Dacthal
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dacthal.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Dacthal is the USEPA Aquatic Life Benchmark of > 11000 ug/L for a nonvascular plant (acute) and vascular plant (acute). The benchmark was derived from a \greater-than\" value (for example, > 265,000) and may overestimate toxicity."
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117638
 
Pollutant: Dacthal
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dacthal.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA Lifetime Health advisory level for Dacthal is 0.07 mg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117639
 
Pollutant: Dacthal
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Dacthal.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Dacthal is the USEPA Aquatic Life Benchmark of > 11000 ug/L for a nonvascular plant (acute) and vascular plant (acute). The benchmark was derived from a \greater-than\" value (for example, > 265,000) and may overestimate toxicity."
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117641
 
Pollutant: Deltamethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Deltamethrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Deltamethrin is the maximum acceptable toxicant concentration (MATC) of 0.02 ug/L.
Guideline Reference: OPP Pesticide Ecotoxicity Database.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118035
 
Pollutant: Deltamethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin/Tralomethrin. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Deltamethrin/Tralomethrin is the USEPA Aquatic Life Benchmark of 0.0041 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118036
 
Pollutant: Deltamethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Deltamethrin/Tralomethrin. Although a total of 3 samples were collected, 3 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Deltamethrin/Tralomethrin is the USEPA Aquatic Life Benchmark of 0.0041 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-10-15 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117645
 
Pollutant: Diazinon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Diazinon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Based on USEPA reference dose (RfD) as a drinking water level, the drinking water health advisory level for Diazinon is 1.4 µg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122736
 
Pollutant: Dichlofenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dichlofenthion, Total. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122737
 
Pollutant: Dichlofenthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Dichlofenthion, Total. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108458
 
Pollutant: Disulfoton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Disulfoton. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117649
 
Pollutant: Disulfoton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Disulfoton.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA drinking water lifetime health advisory for disulfoton is 0.7 µg/L. The Lifetime HA is based on exposure of a 70-kg adult consuming 2 liters of a water a day.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108459
 
Pollutant: Disulfoton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Disulfoton. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Disulfoton is the USEPA Aquatic Life Benchmark of 0.01 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117650
 
Pollutant: Diuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Diuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Diuron is the USEPA Aquatic Life Benchmark of 2.4 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117651
 
Pollutant: Diuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Diuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA health advisory for one-in-a-million incremental cancer risk estimate calculated as a drinking water standard for diuron is 2 µg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117652
 
Pollutant: Diuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Diuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Diuron is the USEPA Aquatic Life Benchmark of 2.4 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117680
 
Pollutant: Dyfonate (Fonofos or Fonophos)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Fonofos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to the USEPA Office of Pesticide Programs Ecotoxicity database, the freshwater aquatic life MATC for fonofos is 0.45 ug/L.
Guideline Reference: OPP Pesticide Ecotoxicity Database.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121397
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endosulfan. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Endosulfan, Total concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121396
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endosulfan. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for endosulfan (l and ll) in fish tissue is 13,000 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; USEPA, 2000)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121285
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endosulfan. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Endosulfan, Total concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117663
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for total endosulfan, which is the sum of alpha endosulfan and beta endosulfan, to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.056 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117662
 
Pollutant: Endosulfan
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Endosulfan, Total criterion for the protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117660
 
Pollutant: Endosulfan sulfate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for endosulfan sulfate to protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117661
 
Pollutant: Endosulfan sulfate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for endosulfan sulfate to protect of human health from the consumption of water and organisms is 110 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121139
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Endrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122597
 
Pollutant: Sulfotep
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Sulfotep, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122598
 
Pollutant: Sulfotep
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Sulfotep, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122610
 
Pollutant: Tedion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tedion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122609
 
Pollutant: Tedion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tedion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122611
 
Pollutant: Terbufos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Terbufos, Total. Twenty-three sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to the 2006 USEPA Drinking Water Standards and Health Advisories, the Life-time Exposure Health Advisory for Terbufos is 0.0004 mg/L. (EPA 822-R-06-013, 2006)
Guideline Reference: 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106109
 
Pollutant: Terbufos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Terbufos. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Terbufos is the USEPA Aquatic Life Benchmark of 0.03 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105187
 
Pollutant: Terbufos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Terbufos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA drinking water health advisory for terbufos is 0.4 µg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119068
 
Pollutant: Terbufos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Terbufos. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Terbufos is the USEPA Aquatic Life Benchmark of 0.03 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105188
 
Pollutant: Terbuthylazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Terbuthylazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Terbuthylazine is the USEPA Aquatic Life Benchmark of 1800 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105189
 
Pollutant: Terbuthylazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Terbuthylazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Terbuthylazine is the USEPA Aquatic Life Benchmark of 1800 ug/L for a fish (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105190
 
Pollutant: Terbutryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Terbutryn.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Terbutryn, calculated using the IRIS Reference Dose, is 7 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.001 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122620
 
Pollutant: Tetrachlorvinphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tetrachlorvinphos, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122621
 
Pollutant: Tetrachlorvinphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tetrachlorvinphos, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105191
 
Pollutant: Tetrachlorvinphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Tetrachlorvinphos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (North Coast Regional Water Quality Control Board).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Tetrachlorvinphos, calculated using the IRIS Reference Dose, is 210 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.03 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105192
 
Pollutant: Thiobencarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Thiobencarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Thiobencarb is the USEPA Aquatic Life Benchmark of 1 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105193
 
Pollutant: Thiobencarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Thiobencarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for thiobencarb is 0.001 mg/L
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105194
 
Pollutant: Thiobencarb
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Thiobencarb.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Thiobencarb is the USEPA Aquatic Life Benchmark of 1 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122634
 
Pollutant: Thiobencarb/Bolero
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Thiobencarb, Total. Two sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for thiobencarb is 0.001 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122633
 
Pollutant: Thiobencarb/Bolero
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Thiobencarb, Total. Eighteen sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for thiobencarb is 0.001 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122635
 
Pollutant: Tokuthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tokuthion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122647
 
Pollutant: Tokuthion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Tokuthion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122649
 
Pollutant: Trichlorfon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Trichlorfon, Total. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122648
 
Pollutant: Trichlorfon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Trichlorfon, Total. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117658
 
Pollutant: beta-Endosulfan (Endosulfan 2)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan II.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for beta-endosulfan to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.056 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117657
 
Pollutant: beta-Endosulfan (Endosulfan 2)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan II.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for beta-endosulfan to protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117659
 
Pollutant: beta-Endosulfan (Endosulfan 2)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan II.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for beta-endosulfan to protect of human health from the consumption of water and organisms is 110 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122580
 
Pollutant: Fenchlorphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenchlorphos, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122593
 
Pollutant: Fenchlorphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenchlorphos, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122595
 
Pollutant: Fenitrothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenitrothion, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122594
 
Pollutant: Fenitrothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fenitrothion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117675
 
Pollutant: Fenitrothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Fenitrothion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenitrothion is the USEPA Aquatic Life Benchmark of 0.087 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117676
 
Pollutant: Fenitrothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Fenitrothion.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenitrothion is the USEPA Aquatic Life Benchmark of 0.087 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117678
 
Pollutant: Fenpropathrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Fenpropathrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.064 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117679
 
Pollutant: Fenpropathrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Fenpropathrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Fenpropathrin is the USEPA Aquatic Life Benchmark of 0.064 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122606
 
Pollutant: Fensulfothion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Fensulfothion, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122680
 
Pollutant: cis-Nonachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Nonachlor, cis-, Total. Eighteen samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122681
 
Pollutant: cis-Nonachlor
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Nonachlor, cis-, Total. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122727
 
Pollutant: p,p'-DDMU
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDMU(p,p'), Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122728
 
Pollutant: p,p'-DDMU
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for DDMU(p,p'), Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117640
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for DDT (Dichlorodiphenyltrichloroethane).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The Total DDT criterion for the protection of human health from consumption of organisms only is 0.00059 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121038
 
Pollutant: Endrin
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Endrin. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Endrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122658
 
Pollutant: Merphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Merphos, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122657
 
Pollutant: Merphos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Merphos, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122619
 
Pollutant: Terbufos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Terbufos, Total. One sample result was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to the 2006 USEPA Drinking Water Standards and Health Advisories, the Life-time Exposure Health Advisory for Terbufos is 0.0004 mg/L. (EPA 822-R-06-013, 2006)
Guideline Reference: 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121094
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Waterboard staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: Zero of Zero samples exceeded the water quality standard for Heptachlor Epoxide. Although data was collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite), all 1 sample(s) had to be thrown out due to quantitation issues.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for heptachlor epoxide in fish tissue is 0.93 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 1999)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121302
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Heptachlor Epoxide. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor Epoxide concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122617
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor Epoxide, Total. Eighteen sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor to protect of human health from the consumption of water and organisms is 0.00021 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122618
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Heptachlor Epoxide, Total. Two sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor to protect of human health from the consumption of water and organisms is 0.00021 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117693
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Heptachlor Epoxide.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor epoxide to protect aquatic life in freshwater criterion continuous concentration (expressed as a 4-day average) is 0.0038 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114112
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor epoxide to protect human health from consumption of organisms only is 0.00011 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106399
 
Pollutant: Heptachlor epoxide
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Heptachlor Epoxide. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for heptachlor epoxide to protect of human health from the consumption of water and organisms is 0.00010 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121128
 
Pollutant: Hexachlorobenzene/ HCB
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Hexachlorobenzene. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for hexachlorobenzene in fish tissue is 2.8 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 2005)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106047
 
Pollutant: Hexachlorobenzene/ HCB
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Hexachlorobenzene. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for hexachlorobenzene to protect human health from consumption of organisms only is 0.00077 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110326
 
Pollutant: Hexachlorobenzene/ HCB
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Hexachlorobenzene. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for hexachlorobenzene to protect of human health from the consumption of water and organisms is 0.00075 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117684
 
Pollutant: Hexachlorocyclohexane (HCH), alpha
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, alpha-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for alpha-BHC to protect human health from consumption of organisms only is 0.013 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117685
 
Pollutant: Hexachlorocyclohexane (HCH), alpha
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, alpha-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for alpha-BHC to protect of human health from the consumption of water and organisms is 0.0039 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117686
 
Pollutant: Hexachlorocyclohexane (HCH), beta
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, beta-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for beta-BHC to protect human health from consumption of organisms only is 0.046 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117687
 
Pollutant: Hexachlorocyclohexane (HCH), beta
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, beta-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for beta-BHC to protect of human health from the consumption of water and organisms is 0.014 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117695
 
Pollutant: Jasmolin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Jasmolin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Jasmolin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Jasmolin-1, and Jasmolin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117696
 
Pollutant: Jasmolin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Jasmolin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Jasmolin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Jasmolin-1, and Jasmolin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122643
 
Pollutant: Leptophos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Leptophos, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122632
 
Pollutant: Leptophos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Leptophos, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121226
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for HCH, gamma-. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Lindane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121225
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for HCH, gamma-. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for lindane in fish tissue is 4.6 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008; OEHHA, 2005)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Guideline Reference: Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121228
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for HCH, gamma-. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum Lindane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117691
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, gamma-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for gamma-BHC (Lindane, gamma-HCH) to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.95 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117690
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, gamma-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for gamma-BHC (Lindane, gamma-HCH) to protect human health from consumption of organisms only is 0.063 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117692
 
Pollutant: Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for HCH, gamma-.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for gamma-BHC (Lindane, gamma-HCH) to protect of human health from the consumption of water and organisms is 0.019 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109026
 
Pollutant: Linuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Linuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Linuron is the USEPA Aquatic Life Benchmark of 0.09 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109027
 
Pollutant: Linuron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Linuron.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Based on USEPA IRIS reference dose (RfD) as a drinking water level, the drinking water health advisory level for linuron is 1.4 µg/L.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122753
 
Pollutant: Prometon (Prometone)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Prometon, Total. Fourteen sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to the 2006 USEPA Drinking Water Standards and Health Advisories, the Life-time Exposure Health Advisory for Prometon (Prometone) is 0.1 mg/L. (EPA 822-R-06-013, 2006)
Guideline Reference: 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109546
 
Pollutant: Prometon (Prometone)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Prometon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Prometon is the USEPA Aquatic Life Benchmark of 98 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109547
 
Pollutant: Prometon (Prometone)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Prometon.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Prometon is the USEPA Aquatic Life Benchmark of 98 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109548
 
Pollutant: Prometryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Prometryn.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Prometryn is the USEPA Aquatic Life Benchmark of 1.04 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109549
 
Pollutant: Prometryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Prometryn.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA expected safe lifetime exposure limit in drinking water for Prometryn, calculated using the IRIS Reference Dose, is 28 ug/L. This was calculated assuming 70 kg body weight, 2 liters/day water consumption, 20% relative source contribution from drinking water, and 0.004 mg/kg/day as the reference dose.
Guideline Reference: IRIS Reference Summary (Various Pollutants)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109550
 
Pollutant: Prometryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Prometryn.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Prometryn is the USEPA Aquatic Life Benchmark of 1.04 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122754
 
Pollutant: Propazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Propazine, Total. Seven sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: According to the 2006 USEPA Drinking Water Standards and Health Advisories, the Life-time Exposure Health Advisory for Propazine is 0.1 mg/L. (EPA 822-R-06-013, 2006)
Guideline Reference: 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109551
 
Pollutant: Propazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Propazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Propazine is the USEPA Aquatic Life Benchmark of 24.8 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109553
 
Pollutant: Propazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Propazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA health advisory for one-in-a-million incremental cancer risk estimate calculated as a drinking water standard for propazine is 100 µg/L.
Guideline Reference: 2012 Edition of the Drinking Water Standards and Health Advisories
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109554
 
Pollutant: Propazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Propazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Propazine is the USEPA Aquatic Life Benchmark of 24.8 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109555
 
Pollutant: Pyrethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Pyrethrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Pyrethrin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Pyrethrin-1 and Pyrethrin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109556
 
Pollutant: Pyrethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Pyrethrin.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Pyrethrin-1 is the USEPA Aquatic Life Benchmark of 0.86 ug/L for an invertebrate (chronic), and is the sum of Pyrethrin-1 and Pyrethrin-2.
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109557
 
Pollutant: Pyrethroids
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Pyrethroids.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of; Bifenthrin, Cyfluthrin, Cypermethrin, Lambda-Cyhalothrin, Deltamethrin, and Permethrin, and Fenpropathrin, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample day is considered to be in exceedance of the water quality standard. (Department of Fish and Game Aquatic Life Criteria for Pyrethroid Insecticides, 2000, UC Davis Aquatic Life Criteria for Pyrethroid Insecticides, 2012)
Guideline Reference: Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109558
 
Pollutant: Pyrethroids
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Pyrethroids.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for the protection of aquatic life from pyrethroids is one toxic unit equivalent. A toxic unit equivalent is equal to the sum of; Bifenthrin, Cyfluthrin, Cypermethrin, Lambda-Cyhalothrin, Deltamethrin, and Permethrin, and Fenpropathrin, each having their reported concentration divided their respective evaluation guideline prior to being summed. If this results in a value greater than one, the sample day is considered to be in exceedance of the water quality standard. (Department of Fish and Game Aquatic Life Criteria for Pyrethroid Insecticides, 2000, UC Davis Aquatic Life Criteria for Pyrethroid Insecticides, 2012)
Guideline Reference: Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)
Guideline Reference: Aquatic life water quality criteria derived via the UC Davis method: ll. Pyrethroid insecticides. Reviews of Environmental Contamination and Toxicology 216:51-103.
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122566
 
Pollutant: Secbumeton
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Secbumeton, Total. Seven samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122584
 
Pollutant: Simazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Simazine, Total. Seven sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for simazine is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105169
 
Pollutant: Simazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Simazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 2.24 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105170
 
Pollutant: Simazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Simazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64444-A for simazine is 0.004 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105171
 
Pollutant: Simazine
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Simazine.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Simazine is the USEPA Aquatic Life Benchmark of 2.24 ug/L for a nonvascular plant (acute).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122596
 
Pollutant: Simetryn
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Simetryn, Total. Seven sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. Seven samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 6/25/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122726
 
Pollutant: Oxychlordane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Oxychlordane, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122715
 
Pollutant: Oxychlordane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Oxychlordane, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119002
 
Pollutant: Parathion
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Parathion, Ethyl. Although a total of 4 samples were collected, 4 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The USEPA national ambient water quality criterion for freshwater aquatic life Criterion Continuous Concentration (expressed as a 4 Day average) for parathion is 0.013 µg/L.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Current as of 08/03/2016.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) 111BN0329).
Temporal Representation: Date for this waterbody was collected over the date range 2013-08-27 to 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109540
 
Pollutant: Permethrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality standard for Permethrin, Total.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The interim criterion maximum concentration to protect aquatic life in freshwater is 0.03 ug/L (DFG 00-6, 2000).
Guideline Reference: Aquatic Life Criteria for Pyrethroid Insecticides (DFG Administrative Report 00-6, 2000)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-10-15 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122740
 
Pollutant: Phorate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Phorate, Total. One sample were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122739
 
Pollutant: Phorate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Phorate, Total. Nine samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109542
 
Pollutant: Phorate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Phorate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109543
 
Pollutant: Phorate
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Phorate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations which are toxic to, or which produce detrimental physiological responses in, human, plant, animal, or aquatic life. (Basin Plan).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The evaluation guideline for Phorate is the USEPA Aquatic Life Benchmark of 0.21 ug/L for an invertebrate (chronic).
Guideline Reference: OPP Aquatic Life Benchmarks
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 76777, Pesticides
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122752
 
Pollutant: Phosmet
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for Phosmet, Total. Two sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. Two samples were removed from assessment because an appropriate evaluation guideline for the water body-pollutant combination could not be obtained for this listing cycle. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan. No evaluation guideline could be found to evaluate protection of the MUN beneficial use that meets the requirements of Section 6.1.3 of the Listing Policy.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
104351
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Selenium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Seventy-three lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN, COLD, and COMM beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceed the objective for the MUN, COLD, and COMM beneficial use(s) and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107553
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119130
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2010-10-24
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107022
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2011-04-14
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119841
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2011-11-20 and 2011-11-20
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105538
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2010-10-24
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119846
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119862
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111263
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107149
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111230
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2012-12-17 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107060
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2010-09-21
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117181
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2012-02-13 and 2012-02-13
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113003
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2011-04-14 and 2011-11-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119144
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-11-07 and 2010-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43388
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Selenium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102660
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2011-04-14 and 2012-02-29
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117173
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2012-12-17 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119407
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2012-12-17 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115793
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119146
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2012-12-17 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119169
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102668
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117193
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117189
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119173
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119166
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108486
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122567
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Selenium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116278
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112900
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113012
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114452
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119850
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119147
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117191
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107124
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112908
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119860
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109560
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119857
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111281
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114425
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106317
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105462
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122568
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Selenium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117180
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111220
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2011-06-15 and 2011-06-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114418
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2010-10-24
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107074
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2010-10-28
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107061
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-12-02 and 2010-12-02
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109559
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119843
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107071
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117128
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105528
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117188
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117197
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119133
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107049
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119484
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117151
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117199
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107118
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121131
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Selenium. Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The OEHHA Fish Contaminant Goal for selenium in fish tissue is 7.4 ppm. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. A background dietary consumption rate of 0.114 mg/day is applied for this micronutrient. (Klasing, S., and R. Brodberg, 2008)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109116
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119148
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2011-10-10 and 2011-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122569
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Selenium, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 2/4/2002-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111206
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119145
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107058
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114832
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43327
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Selenium.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The maximum contaminant level listed in Table 64431-A for selenium is 0.05 mg/L.
Objective/Criterion Reference: Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 104351, Selenium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106177
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Selenium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric selenium criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is 5 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2013-01-15 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
100717
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Silver
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

FIfty seven lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective. Zero of the 488 total silver in water samples and zero of the 443 dissolved silver in water samples exceeded the objective for the protection of the MUN beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of the 488 total silver in water samples and zero of the 443 dissolved silver in water samples exceeded the objective for the protection of the MUN beneficial use, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107083
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111223
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112938
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112932
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112912
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107018
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102663
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112909
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112913
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117141
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107099
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112940
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107014
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112928
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119826
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113065
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107152
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113057
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119206
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102608
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114373
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107021
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119812
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105517
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107094
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107032
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111255
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105510
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102698
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32863
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for silver.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion maximum concentrations (1-hour average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117152
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111286
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114371
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111233
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119832
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105019
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107031
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107043
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43356
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Silver.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107133
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106244
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119448
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122582
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Silver, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107052
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110955
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107034
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110959
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110957
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107146
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111270
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105505
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117983
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119419
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107137
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102699
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119566
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105475
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114360
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111252
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107129
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119827
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113046
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107038
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103351
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116051
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110645
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 115826
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119852
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107122
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112950
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111264
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112919
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103352
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111259
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112949
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112907
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119432
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119204
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114369
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119451
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110948
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105513
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102695
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102676
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105476
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107131
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114358
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102568
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119824
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Silver. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111657
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117835
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122581
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Silver, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s):
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110964
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122583
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Silver, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 2/4/2002-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105785
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for silver is 0.1 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107675
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100717, Silver
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103353
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Silver.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion maximum concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
71284
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Specific Conductivity
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Five lines of evidence are available in the administrative record to assess this pollutant.
Two out of 45 samples in the Mainstem Eel River (LOEs 34403, 21240, 100797, 100787) and 1 of 1 sample from Outlet Creek exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Two out of 45 samples in the Mainstem Eel River (LOEs 34403, 21240, 100797, 100787) and 1 of 1 sample from Outlet Creek exceed the objective for the MUN beneficial use and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 71284, Specific Conductivity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100797
 
Pollutant: Specific Conductivity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality standard for specific conductance. Data range from 246 microhmos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Specific conductivity shall conform to Table 3-1 which states that water quality objective for specific conductivity has an 90% upper limit of 375 micromhus and a 50% upper limit of 225 micromhos.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.4mi above Trout Cr.
(111ERATRC)
Temporal Representation: The samples were collected between the dates 10/10/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. 
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 71284, Specific Conductivity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100787
 
Pollutant: Specific Conductivity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for specific conductance. Data range from 77 microhmos.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Specific conductivity shall conform to Table 3-1 which states that water quality objective for specific conductivity has an 90% upper limit of 375 micromhus and a 50% upper limit of 225 micromhos.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.75 miles above Wesley Ives Creek(111WE0816)
Temporal Representation: The samples were collected between the dates 06/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. 
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 71284, Specific Conductivity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 21240
 
Pollutant: Specific Conductivity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 41 specific conductivity grab samples collected from the Upper Mainstem Eel River exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): The 90% upper limit specific conductance objective at 77 F is 375 micromhos (or mS/cm2). The 50% upper limit specific conductance objective at 77 F is 225 micromhos (or mS/cm2). The 90% and 50% upper limits represent the 90/50 percentile values for a calendar year. 90% or 50% or more of the values must be less than or equal to the upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 71284, Specific Conductivity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 44471
 
Pollutant: Specific Conductivity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Outlet Creek to determine beneficial use support and results are as follows: 1 of 1 samples exceed the 50% upper limit criterion for Specific Conductivity.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for Outlet Creek is a 90% upper limit of 400 uS. Therefore, 90% of the values in a calendar year must be lower than this limit. In addition the site specific objective of 50% upper limit of 200 uS which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 71284, Specific Conductivity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34403
 
Pollutant: Specific Conductivity
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: One of the 2 samples exceeded the objective.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for the mainstem Eel River is a 90% upper limit of 375 uS. Therefore, 90% of the values in a calendar year must be lower than this limit. In addition the site specific objective of 50% upper limit of 225 uS which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected on the following dates: 11/13/2007 2/26/2008 4/8/2008 7/15/2008
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008).
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
 
DECISION ID
72750
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Sulfates
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Sixteen lines of evidence are available in the administrative record to assess this pollutant.
None of the samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114798
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0001)
Temporal Representation: The samples were collected between the dates of 2011-07-05 and 2011-07-05
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105172
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104692
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0007)
Temporal Representation: The samples were collected between the dates of 2011-07-11 and 2011-07-11
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 116604
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 44054
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceed the criterion for Sulfate.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for sulfate is 250 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Outlet Creek - 111PS0008 ]
Temporal Representation: Data was collected over the time period 9/9/2008-9/29/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25536
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 41 sulfate samples collected in the upper mainstem Eel River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007, p. 3-3.00): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per 22 CCR 64449 (Table 64449-B): The recommended secondary maximum contaminant level for sulfate is 250 mg/L.
Guideline Reference: Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 33858
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the evaluation guideline.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2011): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Per 22 CCR 64449 (Table 64449-B): The recommended secondary maximum contaminant level for sulfate is 250 mg/L.
Guideline Reference: Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected approximately once per quarter year from November 2007 to July 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104714
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0110)
Temporal Representation: The samples were collected between the dates of 2014-06-09 and 2014-06-09
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114326
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WE0816)
Temporal Representation: The samples were collected between the dates of 2013-06-12 and 2013-06-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117712
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Perennial Stream Surveys data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Perennial Stream Surveys .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111PS0160)
Temporal Representation: The samples were collected between the dates of 2011-07-25 and 2011-07-25
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120136
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111FS0008)
Temporal Representation: The samples were collected between the dates of 2011-07-06 and 2012-07-19
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114921
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111CBCAER)
Temporal Representation: The samples were collected between the dates of 2013-08-08 and 2013-08-08
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106935
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER003)
Temporal Representation: The samples were collected between the dates of 2014-06-10 and 2014-06-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 101940
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112426
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 72750, Sulfates
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114249
 
Pollutant: Sulfates
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Sulfate.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-B for sulfate is 250 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111ERATRC)
Temporal Representation: The samples were collected between the dates of 2012-10-10 and 2012-10-10
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104987
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Thallium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the Section 303(d) List under Section 3.1 of the Listing Policy. Under Section 3.1, a single line of evidence is necessary to assess listing status.

Forty lines of evidence are available to assess protection of the municipal and domestic supply (MUN) beneficial use. Forty lines of evidence are available to assess protection of the Agricultural Supply (AGR) beneficial use. Forty lines of evidence are available to assess protection of the Commercial or recreational collection of fish, shellfish, or organisms (COMM) beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category (i.e., sufficient justification to not list). This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of Section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of Section 6.1.5 of the Policy. (3) The method detection limit for all samples was greater than the criteria. Thus, per the Listing Policy the data were not used in this assessment. Therefore, there are no data available to assess against protection of the MUN, AGR, and COMM beneficial uses. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114359
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102616
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102569
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102504
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114349
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119570
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119526
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119548
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106258
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119556
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107086
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111219
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102572
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110990
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102515
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113038
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106253
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112942
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113067
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114364
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105470
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102487
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113039
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119428
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117136
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112981
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113219
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119540
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119522
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102693
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114383
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114330
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114405
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106212
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113052
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102632
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112966
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114447
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102579
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112902
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107007
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106299
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114410
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102458
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119523
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102566
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112977
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119402
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106201
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119877
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113018
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107047
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119194
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105537
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106318
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102617
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102553
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114412
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111004
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106255
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106199
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106302
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119208
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105477
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106315
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114351
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102470
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119491
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102454
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102465
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106274
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114427
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119489
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119189
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102528
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112891
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119467
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119458
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106281
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102575
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113050
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The Gold Book states that thallium chronic toxicity to one species of fish occurs at concentrations as low as 20 ug/L after 2,6000 hours of exposure.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102588
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113103
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119417
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117161
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119463
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119578
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107156
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107009
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113090
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102473
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102527
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102581
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119557
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106210
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 33 samples were collected, 33 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-28).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112989
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110980
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-11).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102684
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 35 samples were collected, 35 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-26).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119492
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-12).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106182
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 45 samples were collected, 45 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-23).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114388
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-9).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114424
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 14 samples were collected, 14 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-17).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117205
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119875
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106303
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-21).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119512
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102589
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 39 samples were collected, 39 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-19).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-28 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119811
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102559
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 40 samples were collected, 40 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-22).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119866
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-24).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106206
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 46 samples were collected, 46 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-27).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102584
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-7).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119513
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-14).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113044
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The California Maximum Contaminant Level for thallium incorporated by reference in the Water Quality Control Plan, North Coast Basin is 0.002 mg/L (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102530
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 44 samples were collected, 44 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-25).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-20 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106252
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-10).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114355
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 17 samples were collected, 17 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-3).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106228
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-6).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113109
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 47 samples were collected, 47 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-18).
Temporal Representation: Date for this waterbody was collected over the date range 2010-09-21 to 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 104987, Thallium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114362
 
Pollutant: Thallium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support, and the results are as follows: 0 of the 0 samples exceeded the evaluation guideline for Thallium. Although a total of 18 samples were collected, 18 of these samples were not included in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy Section 6.1.5.5.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: The Thallium criterion for the protection of human health from consumption of organisms only is 6.3 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data was collected from 1 station(s) (Station Code(s) WQ-5).
Temporal Representation: Date for this waterbody was collected over the date range 2010-10-24 to 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
103861
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

[Three lines of evidence are available in the administrative record to assess this pollutant. One of one samples exceed the objective for the COMM beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of one samples exceed the objective for the COMM beneficial use and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103861, Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121476
 
Pollutant: Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 1 of the 1 samples exceeded the water quality standard for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite). Of these, 1 species (Chinook Salmon) exceeded the water quality standard.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: The modified OEHHA Fish Contaminant Goal for total DDT in fish tissue is 15 ppb. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of 1 is applied for skin-off fillets. (Klasing, S., and R. Brodberg, 2008)
Guideline Reference: Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103861, Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121247
 
Pollutant: Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum total DDT concentration of 1000 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103861, Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121451
 
Pollutant: Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)
LOE Subgroup: Pollutant-Tissue
Matrix: Tissue
Fraction: Fish fillet
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Sportfish Rivers and Streams data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows 0 of the 1 samples exceeded the water quality standard for Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD). Data were collected for 1 fish species (1 composite(s) of Chinook Salmon each composed of 5 fish per composite).
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Sportfish Rivers and Streams .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. (Water Quality Control Plan for the North Coast Region)
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: National Academy of Science guidelines (NAS 1972) establish a maximum total DDT concentration of 1000 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.
Guideline Reference: National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
 
Spatial Representation: Data was collected from 1 station(s) with the station code(s): 111EELFCS.
Temporal Representation: Data for this line of evidence were collected between 2011-12-23 and 2011-12-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103898
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Toxicity
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant. One of three samples exceed the objective for the COLD beneficial use and one of three samples exceed the objective for the WARM beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of three samples exceed the objective for the COLD beneficial use and one of three samples exceed the objective for the WARM beneficial use and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103898, Toxicity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120998
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Sediment
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: 0 of the 1 samples collected by SWAMP RWB1 Monitoring for Eel River HU, Upper Main HA (Includes Tomki Creek) exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Water Board(NCRWQCB 2018).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 stations. Monitoring site(s): ( 111BN0329 )
Temporal Representation: The samples were collected between the dates of 2013-11-07 and 2013-11-07.
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103898, Toxicity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120983
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Sediment
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: 0 of the 1 samples collected by SWAMP RWB1 Monitoring for Eel River HU, Upper Main HA (Includes Tomki Creek) exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Hyalella azteca, for Growth (wt/surv indiv), Hyalella azteca, for Survival
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Water Board(NCRWQCB 2018).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 stations. Monitoring site(s): ( 111BN0329 )
Temporal Representation: The samples were collected between the dates of 2013-11-07 and 2013-11-07.
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103898, Toxicity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120965
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: 1 of the 3 samples collected by SWAMP RWB1 Monitoring for Eel River HU, Upper Main HA (Includes Tomki Creek) exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia, for Young/female, Ceriodaphnia dubia, for Survival
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Water Board(NCRWQCB 2018).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 stations. Monitoring site(s): ( 111BN0329 )
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12.
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 103898, Toxicity
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120966
 
Pollutant: Toxicity
LOE Subgroup: Toxicity
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 1
 
Data and Information Type: TOXICITY TESTING
Data Used to Assess Water Quality: 1 of the 3 samples collected by SWAMP RWB1 Monitoring for Eel River HU, Upper Main HA (Includes Tomki Creek) exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day, at the same location with the same lab sample ID (if provided). The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia, for Young/female, Ceriodaphnia dubia, for Survival
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, bioassays of appropriate duration, or other appropriate methods as specified by the Regional Water Board(NCRWQCB 2018).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 stations. Monitoring site(s): ( 111BN0329 )
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12.
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
103864
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Vanadium
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Eighty lines of evidence are available in the administrative record to assess this pollutant. Four of four hundred forty two samples exceed the objective for the MUN beneficial use(s).

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Four of four hundred forty two samples exceed the objective for the MUN beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102505
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102603
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102594
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112901
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113056
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102597
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113021
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119551
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113218
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119543
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113010
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119494
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119576
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119519
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111012
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113026
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102586
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111222
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113073
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105498
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119192
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119456
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107044
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107127
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119461
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114374
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 2 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114372
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119454
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119422
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111009
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112994
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102537
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119547
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114350
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106198
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114348
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119411
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107121
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105478
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107045
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102539
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117184
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106200
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119446
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106233
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102483
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119501
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111024
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114431
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113206
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119562
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107126
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119497
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113216
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119851
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119453
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119199
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119440
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114342
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119397
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119457
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113078
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105503
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102592
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113193
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102506
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119488
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119582
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119514
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102482
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Waters designated for use as agricultural supply (AGR) shall not contain concentrations of chemical constituents in amounts which adversely affect such beneficial use (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Water Quality for Agriculture, published by the Food and Agriculture Organization of the United Nations in 1985, contains criteria protective of various agricultural uses of water. These criteria were used to translate narrative water quality objectives for chemical constituents that prohibit chemicals in concentrations that would impair agricultural uses of water. The 0.1 mg/L criteria is for the recommended maximum concentrations of vanadium in irrigation water
Guideline Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102525
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111015
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113029
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113083
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107120
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113212
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119436
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113068
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106220
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 103864, Vanadium
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107030
 
Pollutant: Vanadium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Vanadium.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life (Water Quality Control Plan, North Coast Basin).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: Drinking water notification levels are published by the Division of Drinking Water and are for chemicals for which there is no drinking water MCL. If a notification level is exceeded, local government notification is required and customer notification is recommended. The criteria for Vanadium is 0.05 mg/L.
Guideline Reference: Drinking Water Notification and Response Levels: An Overview
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
 
DECISION ID
100677
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Zinc
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

100 lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Zero of 540 samples for zinc dissolved in water exceeded the objective for the protection of the COLD beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Zero of 443 samples for zinc dissolved in water exceeded the objective for the protection of the MUN beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Zero of 540 samples for zinc dissolved in water exceeded the objective for the protection of the WARM beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Zero of 491 samples for total zinc in water exceeded the objective for the protection of the MUN beneficial use and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114432
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105456
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102645
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102629
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112034
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111022
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117138
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112992
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119806
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119395
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119507
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111250
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119423
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102642
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114394
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102492
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105596
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120091
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114409
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114442
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106180
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107075
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113098
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102637
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119442
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114395
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102555
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106262
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112929
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114441
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112035
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106313
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102498
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119137
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117163
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 32864
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the hardness based criteria calculated for zinc.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. California Toxics Rule (CTR) lists criterion continuous concentrations (4-day average) to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples collected at station 111ER6140 (Eel River above Dos Rios).
Temporal Representation: Samples collected between 11/13/2007 and 7/15/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102531
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113203
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119534
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102538
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 43271
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Zinc.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119425
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113017
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 11
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 11 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120069
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122661
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Zinc, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107145
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111243
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114407
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110991
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114434
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119530
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102524
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111215
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111027
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119134
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 29 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117170
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106185
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117167
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 39 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106287
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107027
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-17)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119163
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-5)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113204
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-19)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107026
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114754
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 114396
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102655
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113194
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-7)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112036
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-08-27
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121696
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for zinc in 459 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 121793
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Sediment
Matrix: Sediment
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the evaluation guideline for Zinc .
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the North Coast Region).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline: In freshwater sediments the probable effect concentration (predictive of sediment toxicity) for zinc in 459 mg/Kg dry weight (MacDonald et al. 2000a)
Guideline Reference: Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
 
Spatial Representation: Data were collected from 1 station(s). Station Code(s): 111BN0329.
Temporal Representation: Data for this waterbody were collected over the date range 2013-11-07 to 2013-11-07
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105536
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102522
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-6)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117177
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 28
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 28 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-28)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119141
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 42 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-24)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105458
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 17
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 17 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102644
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 30
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 30 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 104069
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 120102
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117134
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113096
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 41
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 41 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-18)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 113035
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 40
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 40 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107114
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 106285
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-22)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111244
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 32
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 32 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-25)
Temporal Representation: The samples were collected between the dates of 2010-09-20 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107097
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 35
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 35 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-27)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122662
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 23
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 0 of 23 samples exceed the criterion for Zinc, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 3/23/2001-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 112946
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-3)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119579
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-14)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 105464
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-11)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107148
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 13
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-9)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 103805
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102532
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-10)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 111242
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 33
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 33 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-23)
Temporal Representation: The samples were collected between the dates of 2010-09-21 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 107144
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 26
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-26)
Temporal Representation: The samples were collected between the dates of 2010-10-28 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122660
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Zinc, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 110509
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Zinc is 5 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 119478
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-12)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2012-12-17
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 102486
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 34
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 34 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for Willits Bypass Monitoring and Reporting Program .
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (WQ-21)
Temporal Representation: The samples were collected between the dates of 2010-10-24 and 2013-01-15
Environmental Conditions:
QAPP Information: Quality Assurance Project Plan for Willits Bypass Project – Surface Water Quality Monitoring
QAPP Information Reference(s): Quality Assurance Project Plan for Willits Bypass Project ¿ Surface Water Quality Monitoring
 
Line of Evidence (LOE) for Decision ID 100677, Zinc
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108016
 
Pollutant: Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Zinc.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) lists criterion continuous concentrations to protect aquatic life in freshwater. The criterion in freshwater is hardness dependent for each sample and varies based on the ambient hardness during sampling. Section (b)(1) in CTR contains the hardness dependent formula for the metals criterion.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104057
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: alpha-Endosulfan (Endosulfan 1)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Three line(s) of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104057, alpha-Endosulfan (Endosulfan 1)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117654
 
Pollutant: alpha-Endosulfan (Endosulfan 1)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan I.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for alpha-endosulfan to protect aquatic life in freshwater as criterion continuous concentration (expressed as a 4-day average) is 0.056 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104057, alpha-Endosulfan (Endosulfan 1)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117653
 
Pollutant: alpha-Endosulfan (Endosulfan 1)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Commercial or recreational collection of fish, shellfish, or organisms
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan I.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for alpha-endosulfan to protection of human health from consumption of organisms only is 240 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 104057, alpha-Endosulfan (Endosulfan 1)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117656
 
Pollutant: alpha-Endosulfan (Endosulfan 1)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Endosulfan I.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: The established numeric criteria for alpha-endosulfan to protect of human health from the consumption of water and organisms is 110 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
104027
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: alpha.-BHC (Benzenehexachloride or alpha-HCH)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line(s) of evidence are necessary to assess listing status.

Two line(s) of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 104027, alpha.-BHC (Benzenehexachloride or alpha-HCH)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122592
 
Pollutant: alpha.-BHC (Benzenehexachloride or alpha-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for HCH, alpha-, Total. Thirty-five sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for alpha-BHC (HCH, alpha) to protect human health from the consumption of water and organisms is 0.0039 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 104027, alpha.-BHC (Benzenehexachloride or alpha-HCH)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122602
 
Pollutant: alpha.-BHC (Benzenehexachloride or alpha-HCH)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 0 samples exceed the criterion for HCH, alpha-, Total. Four sample results were not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy. This LOE re-assesses data from LOE 29807 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other pesticide data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. The established numeric criteria for alpha-BHC (HCH, alpha) to protect human health from the consumption of water and organisms is 0.0039 ug/L (California Toxics Rule, 2000).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Code of Federal Regulations 40 part 131.38 Establishment of numeric criteria for priority toxic pollutants for the State of California. 7/1/2011 Edition
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected on a single day 2/7/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
78987
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: pH
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Four lines of evidence are available in the administrative record to assess this pollutant. One of two samples exceed the objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of two samples exceeded the objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 26 samples is needed to determine if a beneficial use is fully supported using table 3.2.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78987, pH
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34184
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 4 samples exceeded the objective.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Table 3-1 states that the lower limit pH for this water body is 6.5, and the upper limit pH for this water body is 8.5.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected approximately once per quarter year from November 2007 to July 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78987, pH
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100808
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality standard for pH. Data range from 10.8.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The pH shall conform to the values listed in Table 3-1 which states that the water quality objective for pH shall not be depressed below 6.5 or raised above 8.5.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.4mi above Trout Cr.
(111ERATRC)
Temporal Representation: The samples were collected between the dates 10/10/2012.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. 
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 78987, pH
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 33914
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Neither of the 2 samples collected exceeded the objective.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Table 3-1 states that the lower limit pH for surface water bodies for this water body is 6.5, and the upper limit pH is 8.5.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Outlet Creek station (111PS0008).
Temporal Representation: Two samples were collected in September 2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78987, pH
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 100800
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed the data for this water body to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for pH. Data range from 7.7.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Basin, Chapter III, General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The pH shall conform to the values listed in Table 3-1 which states that the water quality objective for pH shall not be depressed below 6.5 or raised above 8.5.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) Eel River ~1.75 miles above Wesley Ives Creek
(111WE0816)
Temporal Representation: The samples were collected between the dates 06/12/2013.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. 
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program  
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
73345
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Aluminum
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Revised
Sources: A Source Unknown
Expected TMDL Completion Date: 2031
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Eight lines of evidence are available in the administrative record to assess this pollutant. Data from a ninth LOE from the 2010 cycle (LOE 25373) were reevaluated in LOEs 122603, 122604, and 122605. Nine of 43 samples from the mainstem Eel River exceed the objective for the MUN beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Nine of 43 samples from the mainstem Eel River exceed the objective for the MUN beneficial use and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 41313
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 1 of 4 samples exceed the criterion for Aluminum.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek) was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 11/13/2007-7/15/2008.
Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data.
QAPP Information: The SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122605
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 20
Number of Exceedances: 6
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)1 to determine beneficial use support and results are as follows: 6 of 20 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)1 was collected at 1 monitoring site [ Eel River above Dos Rios - 111ER6140]
Temporal Representation: Data was collected over the time period 2/4/2002-11/14/2006.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122604
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)3 to determine beneficial use support and results are as follows: 0 of 5 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)3 was collected at 1 monitoring site [ Eel River near Hearst - 111ER7314]
Temporal Representation: Data was collected over the time period 2/7/2002-6/24/2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 122603
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 14
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: State Water Board staff re-assessed SWAMP data for Eel River HU, Upper Main HA (Includes Tomki Creek)2 to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for Aluminum, Total. This LOE re-assesses data from LOE 21523 from the 2010 Integrated Report. Data were re-assessed in order to (1) update the numeric objective, and (2) evaluate these data in their own LOE, instead of being evaluated in the same LOE as other metals data.
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
Objective/Criterion Reference: Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Eel River HU, Upper Main HA (Includes Tomki Creek)2 was collected at 1 monitoring site [ Eel River d/s Van Arsdale Reservoir - 111ER7910]
Temporal Representation: Data was collected over the time period 2/6/2002-4/21/2005.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25373
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 38
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: One of the 38 aluminum samples collected from the Upper Mainstem Eel River exceed the objective. Sample concentrations range from 4.29 to 1,737.00 ug/L. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): The Maximum Contaminant Level for aluminum is 1.0 mg/l (1,000 ug/L).
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 3 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), (2) near Hearst (SWAMP Station ID 111EELHST), and (3) above Dos Rios (SWAMP Station ID 111EELMAN). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. At the Dos Rios site, samples were collected from March 2001 to June 2006. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (Puckett 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 118853
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP RWB1 Monitoring data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP RWB1 Monitoring .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111BN0329)
Temporal Representation: The samples were collected between the dates of 2013-08-27 and 2013-12-12
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 108086
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111WER008)
Temporal Representation: The samples were collected between the dates of 2012-07-23 and 2012-07-23
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 109377
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111TGCAER)
Temporal Representation: The samples were collected between the dates of 2012-07-24 and 2012-07-24
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
Line of Evidence (LOE) for Decision ID 73345, Aluminum
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 117916
 
Pollutant: Aluminum
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Water Board staff assessed SWAMP Reference Condition Management Plan data for Eel River HU, Upper Main HA (Includes Tomki Creek) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality standard for Aluminum.
Data Reference: Water Quality Assessment Data for the 2018 solicitation cycle submitted through CEDEN for SWAMP Reference Condition Management Plan .
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2018): Waters designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Chapter 15. The secondary maximum contaminant level listed in Table 64449-A for Aluminum is 0.2 mg/L.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at 1 monitoring site(s) (111HSCAER)
Temporal Representation: The samples were collected between the dates of 2011-07-26 and 2011-07-26
Environmental Conditions:
QAPP Information: Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program
QAPP Information Reference(s): Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program
 
 
DECISION ID
73885
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Sedimentation/Siltation
Final Listing Decision: Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL)(2016)
Revision Status Original
Sources: Agriculture-grazing | Construction/Land Development | Erosion/Siltation | Flow Alteration/Regulation/Modification | Harvesting, Restoration, Residue Management | Highway/Road/Bridge Construction | Logging Road Construction/Maintenance | Removal of Riparian Vegetation | Silvicultural Point Sources | Silviculture | Streambank Modification/Destabilization
TMDL Name: Eel River, Upper Mainstem Sediment and Temperature TMDLs
TMDL Project Code: 602
Date TMDL Approved by USEPA: 12/29/2004
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Water Board Conclusion:

This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle.

No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for listing under Section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status.

The Upper Main Eel River and Tributaries (including Tomki Creek, Outlet Creek and Lake Pillsbury) Total Maximum Daily Loads for Temperature and Sediment were established by US EPA on December 29, 2004.

Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the Section 303(d) list.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 73885, Sedimentation/Siltation
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 4783
 
Pollutant: Sedimentation/Siltation
LOE Subgroup: Pollutant-Water
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference: Placeholder reference pre-2006 303(d)
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Unknown
Temporal Representation: Unknown
Environmental Conditions: Unknown
QAPP Information: Unknown
QAPP Information Reference(s):
 
 
DECISION ID
72704
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Pentachlorophenol (PCP)
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:

The pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the Section 303(d) List under Section 3.1 of the Listing Policy. Under Section 3.1, a single line of evidence is necessary to assess listing status. One line of evidence is available to assess protection of the municipal and domestic supply (MUN) beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category (i.e., sufficient justification to not list). This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of Section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of Section 6.1.5 of the Policy. (3) Zero of five samples exceeds the evaluation guideline used to interpret the narrative objective, and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met, as a minimum of either (A) 16 samples, or (B) greater than or equal 2 exceedances of the objective with less than 16 samples is needed for application of Table 3.1. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 72704, Pentachlorophenol (PCP)
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25588
 
Pollutant: Pentachlorophenol (PCP)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 5
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the 5 pentachlorophenol samples collected in the Upper Mainstem Eel River watershed exceed the evaluation guideline. Four of the samples were below detection levels (with a reporting limit of 0.001). One sample was detected but not quantified. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per the National Recommended Water Quality Criteria (USEPA 2006): The recommended criterion for pentachlorophenol for the protection of source waters for human health consumption of water and organisms is 0.27 ug/l.
Guideline Reference: National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River at 2 locations as follows: (1) downstream of Van Arsdale Reservoir (SWAMP Station ID 111EELVAN), and (2) near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: At the Van Arsdale site, samples were collected from February 2002 to April 2005. At the Hearst site, samples were collected from February 2002 to June 2002. Most of the site visits corresponded to fall, winter, spring and early summer seasonal conditions.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
72703
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Phenol
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:

The pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the Section 303(d) List under Section 3.1 of the Listing Policy. Under Section 3.1, a single line of evidence is necessary to assess listing status. One line of evidence is available to assess protection of the municipal and domestic supply (MUN) beneficial use.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category (i.e., sufficient justification to not list). This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of Section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of Section 6.1.5 of the Policy. (3) Zero of two samples exceeds the evaluation guideline used to interpret the narrative objective, and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met, as a minimum of either (A) 16 samples, or (B) greater than or equal 2 exceedances of the objective with less than 16 samples is needed for application of Table 3.1. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 72703, Phenol
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 25591
 
Pollutant: 2,3,4,6-tetrachlorophenol
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Not Recorded
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the two 2,3,4,6-tetrachlorophenol samples collected in the Upper Mainstem Eel River watershed exceed the evaluation guideline. Both samples were detected but not quantified (with a reporting limit of 0.002 ug/l). The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008).
Data Reference: Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Per the Basin Plan (NCRWQCB 2007): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1)
 
Evaluation Guideline: Per the "Quality Criteria for Water 1986" (USEPA 1986), also known as the Gold Book: The 2,3,4,6-tetrachlorophenol criterion to control undesirable taste and odor qualities of ambient water is estimated at 1.0 ug/l.
Guideline Reference: Quality Criteria for Water 1986. United States Environmental Protection Agency. Office of Water. Regulations and Standards. Washington D.C. EPA 440/5-86-001.
 
Spatial Representation: Samples were collected from the Upper Mainstem Eel River near Hearst (SWAMP Station ID 111EELHST). Samples were collected from well-mixed flows in glides or riffles.
Temporal Representation: Samples were collected from February 2002 to June 2002.
Environmental Conditions: There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data.
QAPP Information: Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002).
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
 
DECISION ID
78468
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
Pollutant: Total Dissolved Solids
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status Original
Impairment from Pollutant or Pollution: Pollutant
 
Regional Board Conclusion: Regional Board Conclusion:

The pollutant was considered for placement on the section 303(d) list in a previous assessment cycle.

No new information was reviewed for this current assessment cycle. Therefore, the previous conclusion remains unchanged, and is as follows:

This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under this section of the policy, a minimum of one line of evidence is needed to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: (1) The data used satisfies the data quality requirements of section 6.1.4 of the Policy. (2) The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. (3) One of two samples from the mainstem Eel River and zero of two samples from Outlet Creek exceed the objective, and these sample sizes are insufficient to determine with the power and confidence of the Listing Policy if standards are not met, as a minimum of either (A) 26 samples, or (B) greater than or equal to 5 exceedances of the MUN objective with less than 26 samples is needed for application of Table 3.2. (4) Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
Regional Board Decision Recommendation: This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
 
State Board Review of Regional Board Conclusion and Recommendation:
 
State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
 
 
Line of Evidence (LOE) for Decision ID 78468, Total Dissolved Solids
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34358
 
Pollutant: Salinity/TDS/Chlorides
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Neither of the 2 samples exceeded the objectives.
Data Reference: Statewide Perennial Streams Assessment 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Salinity data (ppt) were converted to Total Dissolved Solids (mg/L) so that the data could be compared to the Secondary MCL for TDS (1ppt = 1000 mg/L). Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for TDS in Outlet Creek is a 90% upper limit of 230 mg/L. Therefore, 90% of the values must be lower than this limit. In addition the site specific objective of 50% upper limit of 125 mg/L which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at the Outlet Creek station (111PS0008).
Temporal Representation: The samples were collected on 9/9/2008 and 9/29/2008.
Environmental Conditions:
QAPP Information: SWAMP QAPP (2008) was followed.
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan
 
Line of Evidence (LOE) for Decision ID 78468, Total Dissolved Solids
Region 1     
Eel River HU, Upper Main HA (Includes Tomki Creek)
 
LOE ID: 34900
 
Pollutant: Total Dissolved Solids
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: One of the 2 samples exceeded the objective.
Data Reference: RWB1 Trend Maintenance Periods FYs 2007 2008
 
SWAMP Data: SWAMP
 
Water Quality Objective/Criterion: Water Quality Control Plan, North Coast Region (NCRWQCB 2011): The site specific objective for the mainstem Eel River is a 90% upper limit of 275 mg/L. Therefore, 90% of the values in a calendar year must be lower than this limit. In addition the site specific objective of 50% upper limit of 140 mg/L which represents the 50 percentile values of the monthly means for a calendar year applies to this water body. Therefore, 50% or more of the monthly means in a calendar year must be less than or equal to an upper limit.
Objective/Criterion Reference: Water Quality Control Plan (Basin Plan) for the North Coast Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were collected from the Eel River above Dos Rios station (111ER6140).
Temporal Representation: Samples were collected on the following dates: 11/13/2007 2/26/2008 4/8/2008 7/15/2008
Environmental Conditions:
QAPP Information: N/A
QAPP Information Reference(s): Surface Water Ambient Monitoring Program Quality Assurance Program Plan