Final California 2018 Integrated Report (303(d) List/305(b) Report)

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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


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.

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:

Number of Exceedances:

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.

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:

Number of Exceedances:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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.

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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.

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):


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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

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:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Samples:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Assessment Data 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

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

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:

Number of Exceedances:

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:

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

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data 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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data 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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data 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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data 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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

383

Number of Exceedances:

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:

Temporal Representation:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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.

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):


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.

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

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:

Temporal Representation:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

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:

Number of Exceedances:

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:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

46803

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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


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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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.

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:

Number of Exceedances:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

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:

Number of Exceedances:

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:

Water Quality Control Plan (Basin Plan) for the North Coast Region

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality Control Plan (Basin Plan) for the North Coast Region

Evaluation Guideline:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

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:

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:

Temporal Representation:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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.

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):


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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

Water Quality 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

Water Quality Control 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting 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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Willits Bypass Monitoring and Reporting Program data for Eel River HU, Upper Main HA (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:

Objective/Criterion Reference:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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.

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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.

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

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:

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

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):

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:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

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:

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: