Water Body Name: | San Lorenzo River |
Water Body ID: | CAR3041202219980827084709 |
Water Body Type: | River & Stream |
DECISION ID |
77563 |
Region 3 |
San Lorenzo River |
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Pollutant: | Pathogens |
Final Listing Decision: | Delist from 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Delist from 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Reason for Delisting: | Change from general pollutant to specific pollutant listing (e.g. metals to copper) |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under section 4 of the Listing Policy. This section of the Listing Policy calls for removing waters from the List if the decision is found to be based faulty data and it is demonstrated that the listing would not have occurred in the absence of such faulty data. One line of evidence (LOE) is available in the administrative record to assess this pollutant but no data or information is associated with that LOE. The data cannot be found that was used in the initial assessment of this water segment-pollutant combination.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for this water segment-pollutant combination to be on the List. Furthermore, newer data for individual pollutants are available and will be assessed under individual decisions. Those decisions will replace this decision for the generic pollutant category 'Pathogens.' |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because this decision for the general category of 'Pathogens' is being replaced by individual decisions for each of the fecal indicator bacteria for which there are data. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 4005 | ||||
Pollutant: | Pathogens | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--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: | Unspecified | ||||
Objective/Criterion Reference: | Placeholder reference pre-2006 303(d) | ||||
Evaluation Guideline: | Unspecified | ||||
Guideline Reference: | Placeholder reference pre-2006 303(d) | ||||
Spatial Representation: | Unspecified | ||||
Temporal Representation: | Unspecified | ||||
Environmental Conditions: | Unspecified | ||||
QAPP Information: | Unspecified | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
73325 |
Region 3 |
San Lorenzo River |
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Pollutant: | Nitrate |
Final Listing Decision: | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Agriculture | Domestic Animals/Livestock | Natural Sources | Nonpoint Source | Onsite Wastewater Systems (Septic Tanks) | Other Urban Runoff | Urban Runoff/Storm Sewers | Wastewater |
TMDL Name: | San Lorenzo River Nitrate |
TMDL Project Code: | 519 |
Date TMDL Approved by USEPA: | 01/14/2003 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Nineteen lines of evidence are available in the administrative record to assess this pollutant. Zero of the 3383 nitrate samples exceed the water quality objectives for the Agricultural Supply and Municipal and Domestic Supply beneficial uses. One of the 41 nitrate samples exceeds the water quality objectives for Cold Freshwater Habitat. One of the 41 nitrate/nitrite samples exceeds the water quality objectives for Cold and Warm Freshwater Habitat. Zero of the 41 nitrate/nitrite samples exceed the water quality objectives for Municipal and Domestic Supply based on the Drinking Water MCL of 10 mg/L. However, 244 of 513 nitrate samples exceed the numeric target for Nitrate of 0.33 mg/L, established by Resolution Number 00-003, adopting the TMDL for nitrate in the San Lorenzo River Watershed. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the CWA section 303(d) List. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Two hundred and forty-four (244) of the 513 nitrate samples exceed the numeric target for Nitrate of 0.33 mg/L, established by Resolution number 00-003 adopting the TMDL for nitrate in the San Lorenzo River Watershed. This exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. The San Lorenzo River Nitrate TMDL has been approved by USEPA. 5.Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 18272 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River, 304-SANLO-26 - Garden of Eden] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/7/2005. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 13936 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 39 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 9209 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 17725 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 113 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 113 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 11/13/2001-3/6/2007. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 9201 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 56 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 51559 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The California Maximum Contaminant Level for nitrate (NO3 as N) incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
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LOE ID: | 18604 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 3064 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 3064 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin Objective for municipal and domestic supply uses of inland surface waters (Section II.A.2) states the following: waters shall not contain concentrations of chemical constituents in excess of the limits specified in California Code of Regulations, Title 22, Article 4, Chapter 15, Section 64435, Tables 2 and 3 as listed in Table 3-2. The maximum contaminant level listed in Table 3-2 (inorganic and fluoride concentrations not to be exceeded in domestic or municipal supply) for nitrate is 10.0 mg/L (NO3 as N). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Title 22, Division 4, Ch. 15, Article 4, Section 64431, Table 64431-A | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 12 monitoring sites [ 304SLT_SCC - SLR at BIG TREES, 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLB_SCC - SLR BELOW BOULDER CR., 304SLA_SCC - SLR ABOVE LOVE CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLL_SCC - SLR at LOMOND ST. BRIDGE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 51610 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 41 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N. | ||||
Guideline Reference: | Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111 | ||||
Guideline Reference: | Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints. | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
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LOE ID: | 9200 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 56 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 51586 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 18603 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 3064 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 3064 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 12 monitoring sites [ 304SLT_SCC - SLR at BIG TREES, 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLB_SCC - SLR BELOW BOULDER CR., 304SLA_SCC - SLR ABOVE LOVE CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLL_SCC - SLR at LOMOND ST. BRIDGE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18271 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River, 304-SANLO-26 - Garden of Eden] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/7/2005. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 13935 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 39 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51611 | ||||
Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 41 samples exceed the criterion for Nitrate/Nitrite as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | Technical approach to develop nutrient numeric endpoints for California, Tetra Tech, June 2006. The Central Coast Region numeric target for maximum nitrate concentration is based on the Tetra Tech NNE (Nutrient Numeric Endpoint) Model and CCAMP data for 193 sites, monitored monthly for at least 1 year between January 1998 and December 2006. The model numeric target for aquatic life habitats in the Central Coast Region is 1.0 mg/L Nitrate as N. | ||||
Guideline Reference: | Technical Approach to Develop Nutrient Numeric Endpoints for California. U.S. EPA Region IX. State Water Resources Control Board. 68-C-02-108-To-111 | ||||
Guideline Reference: | Central Coast RegionTechnical Paper: Interpreting Narrative Objectives for Biostimulatory Substances for California Central Coast Waters. This method uses the Technical Approach for Developing California Nutrient Numeric Endpoints. | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 51560 | ||||
Pollutant: | Nitrate/Nitrite (Nitrite + Nitrate as N) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for Nitrate/Nitrite as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Basin Plan is 10.0 mg/L (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 25283 | ||||
Pollutant: | Nitrogen, Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 498 | ||||
Number of Exceedances: | 237 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data collected by Santa Cruz County Environmental Health staff from the San Lorenzo River near Felton (San Lorenzo River at Big Trees (304SLT_SCC) are assessed relative to the numeric target for Nitrate, established by Resolution number 00-003 adopting the TMDL for nitrate in the San Lorenzo River Watershed. 327 of 498 samples exceed the numeric target. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin has the following narrative General Objective: 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, that cause nuisance, or that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Resolution number 00-003 adopting the TMDL for nitrate in the San Lorenzo River Watershed established the following numeric target for Nitrate: San Lorenzo River at Felton, 1.5 mg/L Nitrate as NO3 (or 0.33 mg/L Nitrate as N). | ||||
Guideline Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Spatial Representation: | Data were collected by Santa Cruz County Environmental Health staff from the San Lorenzo River near Felton (San Lorenzo River at Big Trees (304SLT_SCC). | ||||
Temporal Representation: | Santa Cruz County Environmental Health staff conducted monitoring at San Lorenzo River at Big Trees (304SLB) between January 1997 and August 2006. | ||||
Environmental Conditions: | |||||
QAPP Information: | Santa Cruz County Environmental Health monitoring program QA. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 25284 | ||||
Pollutant: | Nitrogen, Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 15 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data collected by CCAMP staff at San Lorenzo River at Big Trees (304SLB) are assessed relative to the numeric target for Nitrate, established by Resolution number 00-003 adopting the TMDL for nitrate in the San Lorenzo River Watershed. 244 of 513 samples exceed the numeric target. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin has the following narrative General Objective: 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, that cause nuisance, or that adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Resolution number 00-003 adopting the TMDL for nitrate in the San Lorenzo River Watershed established the following numeric target for Nitrate: San Lorenzo River at Felton, 1.5 mg/L Nitrate as NO3 (or 0.33 mg/L Nitrate as N). | ||||
Guideline Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Spatial Representation: | Data collected by CCAMP staff at one site, San Lorenzo River at Big Trees (304SLB). | ||||
Temporal Representation: | CCAMP staff conducted monthly monitoring at this site between January 2005 and March 2006 | ||||
Environmental Conditions: | |||||
QAPP Information: | CCAMP monitoring and data analysis is conducted following the SWAMP QAPP (Puckett et al., 2002). | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17724 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 113 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 113 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 11/13/2001-3/6/2007. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 9208 | ||||
Pollutant: | Nitrate | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Nitrate as N. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when nitrate exceeds 30 mg/L NO3 as N in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
68063 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Sedimentation/Siltation |
Final Listing Decision: | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Construction/Land Development | Land Development | Silviculture | Urban Runoff/Storm Sewers |
TMDL Name: | San Lorenzo River Sediment |
TMDL Project Code: | 243 |
Date TMDL Approved by USEPA: | 02/19/2004 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for removal from the CWA section 303(d) List under section 4.9 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.
Two lines of evidence are available in the administrative record to assess this pollutant. The initial decision to place this water body segment-pollutant combination on the 303(d) list was made prior to 2006 and associated data and documentation are not held in an assessment database. As a result, there are no data associated with the LOE that is a placeholder for the original decision to add this water body segment/pollutant combination to the List. However, recent physical habitat and benthic invertebrate community data have been collected and are summarized in one LOE. Two of the three samples have degraded biological community composition (EPT taxa richness less than 12) associated with more than 40 percent cover of deposited fine and sand sized sediment on the streambed. This supports the previous decision to add this water body segment/pollutant combination to the List. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the 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. Twelve of the 20 stations has more than 40 percent cover of deposited fine and sand sized sediment on the streambed. Five of the samples also have degraded biological community composition (EPT taxa richness less than 12). This supports the previous decision to add this water body segment/pollutant combination to the List. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 95253 | ||||
Pollutant: | Sediment | ||||
LOE Subgroup: | Population/Community Degradation | ||||
Matrix: | Not Specified | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 12 | ||||
Data and Information Type: | BIOLOGICAL MONITORING | ||||
Data Used to Assess Water Quality: | Water Board staff evaluated sediment grain size and EPT taxa data that was collected following the SWAMP physical habitat and benthic invertebrate protocol from San Lorenzo River. At twelve of the twenty stations, deposited fine and sand (FS) sediments on the stream bed were greater than 40%. In addition, less than 12 EPT taxa (EPT richness) were present at five of the twenty stations indicating degraded biological diversity and community composition at these locations. It is likely that degraded benthic invertebrate community condition is impacted by sediment deposition in this stream. | ||||
Data Reference: | Three papers summarizing numeric TMDL targets for benthic invertebrates and sediment indicators in the San Lorenzo River Watershed | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Central Coast Water Quality Control Plan (Basin Plan) general water quality objective. Waters shall not contain settable material in concentrations that result in deposition of material that cause nuisance or adversely affects beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan for the Central Coastal Basin | ||||
Evaluation Guideline: | Loss of benthic invertebrate species diversity and altered community composition (based on the number of mayfly, stonefly and caddisfly taxa or EPT taxa richness) occurs when deposited fine and sand (FS) sediments on the stream bed exceeds 40% relative to Central Coast reference stream species composition and diversity (Herbst, D.B., et al, 2014 and Herbst, D.B., et al, 2011). | ||||
Guideline Reference: | Three papers summarizing numeric TMDL targets for benthic invertebrates and sediment indicators in the San Lorenzo River Watershed | ||||
Spatial Representation: | Ten monitoring locations: Campbell (2007), RR bridge (2007, 2008, 2009), city intake (2008, 2009), Brimblecom (2008, 2009), Castle Rock (2008, 2009), Paradise (2008, 2009), entrance bdg (2008, 2009), San Lo Way (2008, 2009), Hwy 9 X (2008, 2009), E Lomond bdg (2008, 2009), | ||||
Temporal Representation: | Samples were collected in the spring - early season of 2007, 2008 and 2009 | ||||
Environmental Conditions: | None | ||||
QAPP Information: | SWAMP protocols were followed for sample collection. SWAMP QAPP was followed. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 1839 | ||||
Pollutant: | Sedimentation/Siltation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Warm Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
73502 |
Region 3 |
San Lorenzo River |
||
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 | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | The pollutant name was changed to ¿Ammonia¿ in the 2014 assessment cycle. This decision replaces the two previously approved decisions, one for each of the pollutants unionized ammonia and total ammonia. This decision contains all of the LOEs from those decisions in addition to new LOEs.
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. Nine lines of evidence (LOEs) are available in the administrative record to assess this pollutant. Three LOEs summarize unionized ammonia data in which zero of the 150 samples exceed the water quality objective for unionized ammonia set to protect aquatic life. Six LOEs summarize total ammonia data and zero of the 300 samples exceed the EPA's Lifetime Health advisory level for total ammonia in drinking 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 sample exceed the water quality objectives and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 9213 | ||||
Pollutant: | Ammonia (Unionized) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 54 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 54 samples exceed the criterion for Ammonia as N, Unionized. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) . | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51599 | ||||
Pollutant: | Ammonia (Unionized) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 40 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 40 samples exceed the criterion for Ammonia as N, Unionized. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) . | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 17817 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 113 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 113 samples exceed the criterion for Ammonia As N, Total. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006). | ||||
Objective/Criterion Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 11/13/2001-3/6/2007. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 9205 | ||||
Pollutant: | Ammonia (Unionized) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 56 samples exceed the criterion for Ammonia as N, Unionized. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin General Objective, Chapter III, Section II.A.2 (General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries) states that the discharge of wastes shall not cause concentrations of unionized ammonia (NH3) to exceed 0.025 mg/l (as N) in receiving waters (page III-4) . | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51549 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for Ammonia As N, Total. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-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: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 9204 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Ammonia as N, Total. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006). | ||||
Objective/Criterion Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 9212 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 56 samples exceed the criterion for Ammonia as N, Total. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006). | ||||
Objective/Criterion Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 13951 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 20 samples exceed the criterion for Ammonia As N, Total. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006). | ||||
Objective/Criterion Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 10/21/2003-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18788 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for Ammonia As N, Total. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Health Advisory 2006 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-06-013, 2006). | ||||
Objective/Criterion Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Evaluation Guideline: | EPA's Lifetime Health advisory level for total ammonia is 30.0 mg/L as stated on page 8 of the 2006 edition of the drinking water standards and health advisories. This Advisory Level is defined as "the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for up to ten days of exposure." | ||||
Guideline Reference: | 2006 edition of the drinking water standards and health advisories. EPA 822-R-03-013 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLT_SCC - SLR at BIG TREES, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 3/16/1990-10/29/2001. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76350 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Anthracene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
Two lines of evidence are available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15818 | ||||
Pollutant: | Anthracene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Anthracene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for anthracene is 845 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
81820 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Arsenic |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15628 | ||||
Pollutant: | Arsenic | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Arsenic. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for arsenic is 33 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
81873 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Benzo(a)anthracene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
Two lines of evidence are available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15497 | ||||
Pollutant: | Benzo(a)anthracene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Benzo(a)anthracene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Benzo(a)anthracene is 1050 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
81875 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Benzo(a)pyrene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
Two lines of evidence are available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15582 | ||||
Pollutant: | Benzo(a)pyrene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Benzo(a)pyrene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Benzo(a)Pyrene is 1450 ug/Kg dry weight (Macdonald et al. 2000) | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
85190 |
Region 3 |
San Lorenzo River |
||
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 | Original |
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.
Three lines of evidence are available in the administrative record to assess this pollutant. Fourteen of the 150 samples exceed the water quality objective for agricultural uses. Based on the readily available data and information, the weight of evidence indicates that there is insufficient justification for 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. Fourteen of the 150 samples exceed the water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 51574 | ||||
Pollutant: | Boron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 8 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 8 of 41 samples exceed the criterion for Boron, dissolved. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. In addition, waters used for irrigation and livestock watering shall not exceed concentrations for those chemicals listed in Table 3-4 (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). Table 3-4 (page III-9) lists the maximum concentration for boron for irrigation supply is 0.75 mg/L. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 9214 | ||||
Pollutant: | Boron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 49 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 49 samples exceed the criterion for Boron, dissolved. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. In addition, waters used for irrigation and livestock watering shall not exceed concentrations for those chemicals listed in Table 3.4 (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). Table 3-4 (page III-9) lists the maximum concentration for boron for irrigation supply is 0.75 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 9206 | ||||
Pollutant: | Boron | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 60 samples exceed the criterion for Boron, dissolved. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. In addition, waters used for irrigation and livestock watering shall not exceed concentrations for those chemicals listed in Table 3.4 (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). Table 3-4 (page III-9) lists the maximum concentration for boron for irrigation supply is 0.75 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
73088 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Cadmium |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15443 | ||||
Pollutant: | Cadmium | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Cadmium. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for cadmium is 4.98 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72906 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Chlorophyll-a |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
Four lines of evidence are available in the administrative record to assess this pollutant. Zero of the 157 samples exceed the evaluation guideline (North Carolina Administrative code, Title 15A) used to interpret the narrative water quality objective for bio-stimulation risk and aquatic life 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. 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 157 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 51609 | ||||
Pollutant: | Chlorophyll-a | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 39 samples exceed the criterion for Chlorophyll a. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Guideline Reference: | Water quality standards table | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 9203 | ||||
Pollutant: | Chlorophyll-a | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 55 samples exceed the criterion for Chlorophyll a. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Objective/Criterion Reference: | Water quality standards table | ||||
Evaluation Guideline: | North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 9207 | ||||
Pollutant: | Chlorophyll-a | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 62 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 62 samples exceed the criterion for Chlorophyll a. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Objective/Criterion Reference: | Water quality standards table | ||||
Evaluation Guideline: | North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 12025 | ||||
Pollutant: | Chlorophyll-a | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlorophyll a. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain biostimulatory substances in concentrations that promote aquatic growths to the extent that such growths cause nuisance or adversely affect beneficial uses (general objective for biostimulatory substances, Water Quality Control Plan, Central Coast Basin, Chapter III, Section II). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Objective/Criterion Reference: | Water quality standards table | ||||
Evaluation Guideline: | North Carolina Administrative code (NCAC), Title 15A - Environmental and Natural Resources, Subchapter 2B-Surface water and wetland standards, Rule 0211-Fresh surface water quality standards for class C waters (Class C is defined as freshwaters protected for secondary recreation, fishing, aquatic life including propagation and survival, and wildlife). Section 3(a) of Rule 0211 applies to all fresh surface waters and states that chlorophyll a is not to exceed 40 ug/L. | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Guideline Reference: | North Carolina standards, criteria, or toxic concentrations. Adopted per title 15A North Carolina Administrative Code subchapter 2B - Surface water and wetland standards | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 7/6/2001. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
81928 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Chromium |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 15901 | ||||
Pollutant: | Chromium (total) | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chromium. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for chromium is 111 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76352 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Chrysene (C1-C4) |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
Two lines of evidence are available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 16103 | ||||
Pollutant: | Chrysene (C1-C4) | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chrysene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Chrysene is 1290 ug/Kg dry weight (Macdonald et al. 2000) | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
73108 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Copper |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 16795 | ||||
Pollutant: | Copper | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Copper. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for cooper is 149 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
77005 |
Region 3 |
San Lorenzo River |
||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
Four lines of evidence are available in the administrative record to assess this pollutant. None of the nine samples exceed the water quality objectives for DDT, DDE or DDD (USEPA, 40 CFR, May 2000). Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of the nine samples exceed the water quality objectives for DDT, DDE or DDD (USEPA, 40 CFR, May 2000) 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 29948 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for 4,4'-DDT is 0.00057 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 29949 | ||||
Pollutant: | DDD (Dichlorodiphenyldichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for 4,4'-DDD is 0.00083 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 29950 | ||||
Pollutant: | DDE (Dichlorodiphenyldichloroethylene) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for 4,4'-DDE is 0.00059 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 29947 | ||||
Pollutant: | DDT (Dichlorodiphenyltrichloroethane) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Warm Freshwater Habitat | Wildlife Habitat | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentration which are toxic to, or which produce detrimental physiological responses in human, plant, animal, or aquatic life (Central Coast Water Quality Control Plan, general Objective, Section II.A.2.a). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | The Criteria Continuous Concentration (CCC) or the the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects for 4,4'-DDT is 0.001 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000.) ) | ||||
Guideline Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
80859 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Diazinon |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | No new data are assessed. This decision has not changed from the 2010 listing cycle.
This pollutant is being considered for placement on the section 303(d) list under section 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) list. Three lines of evidence are available in the administrative record to assess this pollutant. Zero of eight water samples exceeded the aquatic life water quality objective. The two sediment samples (pore water) did not exceed the Evaluation Guideline (Finlayson, 2004) applied to protect for aquatic life beneficial uses. There is no diazinon evaluation guideline specific to "sediment, interstitial water" (pore water). LOEs summarizing pore water results will not be the sole basis for any decision. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of eight water samples exceeded the aquatic life water quality objective. The two sediment samples (pore water) did not exceed the aquatic life water quality objective; however, these samples will not be included in the exceedance count because the criteria used are specific to water samples, not sediment pore water. This does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. The sample sizes are insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of 16 samples is needed for application of Table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 16662 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Evaluation Guideline: | One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 16805 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304SL9-San Lorenzo River at Highway 9, 304SLB001 - San Lorenzo River at Big Trees, 304RIV-San Lorenzo River at Crossing Road] | ||||
Temporal Representation: | Data was collected over the time period 1/3/2006-5/30/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 16704 | ||||
Pollutant: | Diazinon | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Diazinon. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Evaluation Guideline: | One hour average maximum concentration 0.16 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 5/3/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
82423 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Dieldrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
Three lines of evidence are available in the administrative record to assess this pollutant. The single sediment sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. In water samples, none of the nine samples exceeded the water quality objectives for aquatic life or for municipal and Domestic Supply. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sediment sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. None of the nine samples exceeded the water quality objectives for aquatic life or for municipal and Domestic Supply. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 16494 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Dieldrin. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for dieldrin is 61.8 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 29945 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Warm Freshwater Habitat | Wildlife Habitat | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentration which are toxic to, or which produce detrimental physiological responses in human, plant, animal, or aquatic life (Central Coast Water Quality Control Plan, general Objective, Section II.A.2.a). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | The Criteria Continuous Concentration (CCC) or the the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects for Dieldrin is 0.056 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000.) ) | ||||
Guideline Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 29946 | ||||
Pollutant: | Dieldrin | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for Dieldrin is 0.00014 ug/L(USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
82372 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Endrin |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 16577 | ||||
Pollutant: | Endrin | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Endrin. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for endrin is 207 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75374 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Fluoranthene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One lines of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 16410 | ||||
Pollutant: | Fluoranthene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Fluoranthene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Fluoranthene is 2,230 ug/Kg dry weight (Macdonald et al. 2000) | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75897 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Fluorene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 17291 | ||||
Pollutant: | Fluorene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Fluorene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for fluorene is 536 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72940 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Lead |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 17376 | ||||
Pollutant: | Lead | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Lead. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for lead is 128 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
100100 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Mercury |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 17190 | ||||
Pollutant: | Mercury | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Mercury. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for mercury is 1.06 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75898 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Naphthalene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 17013 | ||||
Pollutant: | Naphthalene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Naphthalene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for naphthalene is 561 ug/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72684 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Nickel |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 17094 | ||||
Pollutant: | Nickel | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Nickel. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for nickel is 48.6 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76695 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Nitrogen, Nitrite |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
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 is available in the administrative record to assess this pollutant. Zero of the 41 samples exceed the water quality objective for agricultural 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. Zero of the 41 samples exceed the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 51596 | ||||
Pollutant: | Nitrogen, Nitrite | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for Nitrite as N. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. In addition, waters used for irrigation and livestock watering shall not exceed concentrations for those chemicals listed in Table 3-4 (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). Table 3-4 (page III-9) lists the maximum concentration for nitrite for livestock watering is 10 mg/L. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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 |
85509 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Oxygen, Dissolved |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
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.
Twelve lines of evidence are available in the administrative record to assess this pollutant. Two hundred eighty-three (283) of the 5,500 samples exceeded the water quality objective for dissolved oxygen in Cold Freshwater Habitats. The Basin Plan general water quality objective for oxygen saturation states that the median value shall not fall below 85% saturation. However, the oxygen saturation objective is only applied ¿for waters not mentioned by a specific beneficial use¿¿ and this water body is designated for Cold Freshwater Habitats. Therefore, the use support rating for oxygen saturation is set at Insufficient Information. 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. Two hundred eighty-three (283) of the 5,500 samples exceeded the water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 51612 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 41 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 17842 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 98 | ||||
Number of Exceedances: | 22 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 22 of 98 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19791 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5219 | ||||
Number of Exceedances: | 252 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 252 of 5219 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 12 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 12026 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 12006 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 12 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 12 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 12027 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 60 samples exceed the criterion for Oxygen, Saturation. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Median values should not fall below 85% saturation as a result of controllable water quality conditions. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 11987 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 4 of 56 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51613 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 41 samples exceed the criterion for Oxygen, Saturation. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Median values should not fall below 85% saturation as a result of controllable water quality conditions (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 11988 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 11 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 11 of 56 samples exceed the criterion for Oxygen, Saturation. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Median values should not fall below 85% saturation as a result of controllable water quality conditions. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19854 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1506 | ||||
Number of Exceedances: | 197 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 197 of 1506 samples exceed the criterion for Oxygen, Saturation. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Median values should not fall below 85% saturation as a result of controllable water quality conditions. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 12 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 6/25/1990-6/2/1998. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18229 | ||||
Pollutant: | Oxygen, Dissolved | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 14 samples exceed the criterion for Oxygen, Dissolved. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, Cold Water Habitat Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: The dissolved oxygen concentration shall not be reduced below 7.0 mg/l at any time. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 12007 | ||||
Pollutant: | Dissolved oxygen saturation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 12 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 12 samples exceed the criterion for Oxygen, Saturation. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: Median values should not fall below 85% saturation as a result of controllable water quality conditions. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75424 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Phenanthrene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | No new data were assessed.
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment. The pollutant concentration in sediment must be associated with toxicity to result in addition of the pollutant to the Section 303(d) list. One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. 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. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 16990 | ||||
Pollutant: | Phenanthrene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Phenanthrene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Phenanthrene is 1170 ug/Kg dry weight (Macdonald et al. 2000) | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
75945 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Pyrene |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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LOE ID: | 17880 | ||||
Pollutant: | Pyrene | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Pyrene. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for Pyrene is 1520 ug/Kg dry weight (Macdonald et al. 2000) | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
85299 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Specific Conductivity |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
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.
Note that the pollutant name for the older LOEs and decisions is electrical conductivity. This was an error and the pollutant name should have always been specific conductivity. For this reason, the pollutant name was changed for this decision and sample and exceedance counts are summed for LOEs with both pollutant names in this assessment for specific conductivity. Seven lines of evidence are available in the administrative record to assess this pollutant. A total of 674 of the 5609 samples exceed the water quality objective for agricultural uses. Note that all exceedances are in the lowest 1 mile of the River where there is tidal influence 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. A total of 674 of the 5609 samples exceed the water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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LOE ID: | 10168 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 17888 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 36 | ||||
Number of Exceedances: | 36 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 36 of 36 samples exceed the criterion for Conductivity(ms). | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 8/24/2004-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10358 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 10 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 10 of 56 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file3 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file1 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17609 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 13 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 13 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 10377 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 10 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17526 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 68 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 4 of 68 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 12/4/2001-11/2/2004. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 51585 | ||||
Pollutant: | Specific Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 18 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 18 of 41 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3000 uS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
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LOE ID: | 18566 | ||||
Pollutant: | Electrical Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 5325 | ||||
Number of Exceedances: | 604 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 604 of 5325 samples exceed the criterion for Conductivity(Us). | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when conductivity exceeds 3.0 mS/cm in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
74249 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Toxicity |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 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. One sample can have multiple toxicity test results but will be counted only once. One sample is defined as being collected on the same day and time at the same location. One LOE summarizes sediment samples. Two sediment samples are summarized in LOEs using the test organism as the pollutant (i.e. invertebrate toxicity). Zero of the two sediment samples resulted in a significant toxic effect to one or more test organisms. Two LOEs summarize water samples. Eight water samples are summarized in LOEs using each of the test organisms as the pollutant name (i.e. plant toxicity, invertebrate toxicity or vertebrate toxicity). Zero of the eight water samples resulted in a significant toxic effect to one or more test organisms. 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 supported and a minimum of two exceedances is needed to determine if beneficial uses are not supported using table 3.1. Therefore, the use support rating is set to 'insufficient information'. 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 sediment samples, or water samples, resulted in a significant toxic effect to one or more test organisms. Therefore, 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 24267 | ||||
Pollutant: | Plant Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Toxicity, Selenastrum capricornutum Growth (Cell Density) 4 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met). | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Significant reduction in cell count of test organism relative to the control (alpha < 0.05) and cell count <80% of control. | ||||
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 San Lorenzo River was collected at 4 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304SL9-San Lorenzo River at Highway 9, 304SLB001 - San Lorenzo River at Big Trees, 304RIV-San Lorenzo River at Crossing Road] | ||||
Temporal Representation: | Data was collected over the time period 1/3/2006-5/30/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 24260 | ||||
Pollutant: | Invertebrate Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Toxicity, Ceriodaphnia dubia Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met). | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival. | ||||
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 San Lorenzo River was collected at 4 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304SL9-San Lorenzo River at Highway 9, 304SLB001 - San Lorenzo River at Big Trees, 304RIV-San Lorenzo River at Crossing Road] | ||||
Temporal Representation: | Data was collected over the time period 1/3/2006-5/30/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 24264 | ||||
Pollutant: | Invertebrate Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met). | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival. | ||||
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 San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 24263 | ||||
Pollutant: | Invertebrate Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Toxicity, Hyalella azteca Survival (%) 10 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met). | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival. | ||||
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 San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 5/3/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 24266 | ||||
Pollutant: | Vertebrate Toxicity | ||||
LOE Subgroup: | Toxicity | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | TOXICITY TESTING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 8 samples exceed the criterion for Toxicity, Pimephales promelas Survival (%) 7 days. Toxicity is defined by SWAMP (2004) as follows: Significant toxicity in the survival endpoint when compared to the negative control based on a statistical test with alpha of less than 5%, and less than the evaluation threshold (both criteria are met). | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. Compliance with this objective will be determined by use of indicator organisms, analyses of species diversity, population density, growth anomalies, toxicity bioassays of appropriate duration, or other appropriate methods as specified by the Regional Board (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Significant reduction of survival of test organism relative to the control (alpha < 0.05) and test organism survival is 20% less than the control survival. | ||||
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 San Lorenzo River was collected at 4 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304SL9-San Lorenzo River at Highway 9, 304SLB001 - San Lorenzo River at Big Trees, 304RIV-San Lorenzo River at Crossing Road] | ||||
Temporal Representation: | Data was collected over the time period 1/3/2006-5/30/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
73222 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Turbidity |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 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.
Seven lines of evidence are available in the administrative record to assess this pollutant. Two hundred and eight (208) of the 5,016 samples exceed the evaluation guideline for Cold Freshwater Habitat (Sigler et al. 1984) 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. Two hundred and eight (208) of the 5,016 samples exceed the evaluation guideline and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 12009 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 3 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 3 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/29/2001. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19936 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4878 | ||||
Number of Exceedances: | 189 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 189 of 4878 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLB_SCC - SLR BELOW BOULDER CR., 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304WGP_SCC - SLR at WATERMAN GAP, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS, 304SLR_SCC - SLR at RIVER ST., B.C.] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18706 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 4 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ 304-SANLO-26 - Garden of Eden, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/7/2005-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51547 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 4 of 41 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. (Basin Plan) | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | Turbidities of 25 NTU or greater can cause a reduction in juvenile salmonid growth due to interference with their ability to find food (Sigler et al. 1984). | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 12044 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 33 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 33 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 2/16/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 11990 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 49 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 7 of 49 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17523 | ||||
Pollutant: | Turbidity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 8 samples exceed the criterion for Turbidity(NTU). | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall be free of changes in turbidity that cause nuisance or adversely affect beneficial uses. Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Sigler et al. (1984) states that turbidities of 25 NTU's or greater caused reduction in juvenile salmonid growth due to interference with their ability to find food. | ||||
Guideline Reference: | Effects of chronic turbidity on density and growth of steelheads and coho salmon. Transactions of the American Fisheries Society 113:142-150 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 10/19/2005-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
72848 |
Region 3 |
San Lorenzo River |
||
Pollutant: | 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 | Original |
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 3.6 of the Listing Policy. Under section 3.6 at least two lines of evidence are necessary to assess listing status for pollutants in sediment, and pollutant concentrations in sediment must be associated with sediment toxicity to justify adding that pollutant to the CWA section 303(d) List.
One line of evidence is available in the administrative record to assess this pollutant. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. The single sample did not exceed the Evaluation Guideline (MacDonald et al. 2000) as it applies to aquatic life beneficial uses. The 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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LOE ID: | 17689 | ||||
Pollutant: | Zinc | ||||
LOE Subgroup: | Pollutant-Sediment | ||||
Matrix: | Sediment | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Zinc. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
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. (Water Quality Control Plan, Central Coast Basin, General Objective Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | In fresh water sediments the probable effects level (predictive of sediment toxicity) for zinc is 459 mg/Kg dry weight (MacDonald et al. 2000). | ||||
Guideline Reference: | Development and evaluation of consensus-based sediment effect concentrations for polychlorinated biphenyls. Environmental Toxicology and Chemistry. 19(5): 1403-1413 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
84669 |
Region 3 |
San Lorenzo River |
||
Pollutant: | pH |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
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.
Thirty-five lines of evidence are available in the administrative record to assess this pollutant. Five beneficial uses are assessed. Three hundred thirty-six (336) of the 5833 samples exceed the water quality objective for Cold Freshwater Habitat, 207 of the 5833 samples exceed the water quality objective for Agricultural Supply, and 303 of the 5833 samples exceeded the water quality objectives for Drinking Water and Recreation. 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. Three-hundred-thirty-six of the 5833 samples exceed the water quality objective for Cold Freshwater Habitat, 207 of the 5833 samples exceed the water quality objective for Agricultural Supply, and 303 of the 5833 samples exceeded the water quality objectives for Drinking Water and Recreation. None of these exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 19012 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 17593 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 101 | ||||
Number of Exceedances: | 11 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 11 of 101 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10378 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51546 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for pH. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The pH value shall not be depressed below 7.0 or raised above 8.5 (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
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LOE ID: | 10186 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 56 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 19914 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5556 | ||||
Number of Exceedances: | 316 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 316 of 5556 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 19013 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 14 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 17594 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 101 | ||||
Number of Exceedances: | 16 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 16 of 101 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 10379 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 10360 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 55 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Water Quality Control Plan, Central Coast Basin, General Objective, Chapter III, Section II.A.2 General Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries states the following: For waters not mentioned by a specific beneficial use, the pH value shall not be depressed below 7.0 or raised above 8.5. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51561 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 41 samples exceed the criterion for pH. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The pH value shall not be depressed below 6.5 or raised above 8.3 (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10394 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10361 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 6 of 55 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10187 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 56 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19928 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 5556 | ||||
Number of Exceedances: | 277 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 277 of 5556 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19014 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17595 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 101 | ||||
Number of Exceedances: | 14 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 14 of 101 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin, Section II.A.2. Municipal and Domestic Supply Objectives, Section II.A.2.a states the following: The pH value shall neither be depressed below 6.5 or raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51576 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 41 samples exceed the criterion for pH. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10376 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 6 of 55 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10396 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 17611 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 101 | ||||
Number of Exceedances: | 14 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 14 of 101 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19913 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 5556 | ||||
Number of Exceedances: | 189 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 189 of 5556 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51597 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 41 samples exceed the criterion for pH. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Region Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10185 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 56 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 10359 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 4 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 4 of 55 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when pH is greater than 8.4 or less than 6.5 in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19031 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10395 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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|||||
LOE ID: | 10362 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 55 | ||||
Number of Exceedances: | 6 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 6 of 55 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19929 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 5556 | ||||
Number of Exceedances: | 277 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 277 of 5556 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 17596 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 101 | ||||
Number of Exceedances: | 14 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 14 of 101 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51564 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 41 samples exceed the criterion for pH. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The pH value shall neither be depressed below 6.5 nor raised above 8.3 (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
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LOE ID: | 10188 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 56 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 19032 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 10189 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 56 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 19930 | ||||
Pollutant: | pH | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 5556 | ||||
Number of Exceedances: | 277 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 277 of 5556 samples exceed the criterion for pH. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: pH value shall neither be depressed below 6.5 nor raised above 8.3. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76245 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Chlordane |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2027 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under sections 2.1 and 3.1 of the Listing Policy.
Two lines of evidence are available in the administrative record to assess this pollutant. Two of nine samples exceed the Human Health Criteria (USEPA, 40 CFR, May 2000) and this exceeds the allowable frequency in table 3.1 of the Listing Policy. Based on section 3.1 the site exceeded numeric objectives for toxic pollutants. Using the binomial distribution, waters shall be placed on the section 303(d) list if the number of measured exceedances supports rejection of the null hypothesis as presented in Table 3.1. 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 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.Two of nine samples exceed the Human Health Criteria (USEPA, 40 CFR, May 2000) and this exceeds the allowable frequency 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 29892 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. Two of the nine samples exceed the Human Health Criteria. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for Chlordane is 0.00057 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 29891 | ||||
Pollutant: | Chlordane | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Warm Freshwater Habitat | Wildlife Habitat | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentration which are toxic to, or which produce detrimental physiological responses in human, plant, animal, or aquatic life (Central Coast Water Quality Control Plan, general Objective, Section II.A.2.a). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | The Criteria Continuous Concentration (CCC) or the the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects for Chlordane is 0.0043 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000.) ) | ||||
Guideline Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
85245 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Chloride |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | Hydromodification | Other |
Expected TMDL Completion Date: | 2027 |
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.
Two lines of evidence are available in the administrative record to assess this pollutant. Fifty-one of the 90 samples exceed the water quality objective for agricultural uses. However, all exceedances of this objective occurred at a single station (304LOR - San Lorenzo River at Laurel Street). This location is tidally influenced. A recent monitoring data summary (for the county of Santa Cruz) states the following: "During periods of macrotidal circulation with strong tidal influence (May through July 2008), water quality parameters (surface and bottom water temperature, salinity, and DO and bottom water pH and ORP) mimic the up and down patter of the tides." 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. Fifty-one of the 90 samples exceed the water quality objective for agricultural uses 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. However, all exceedances of this objective occurred at a single station which is tidally influenced. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 9215 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 49 | ||||
Number of Exceedances: | 23 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 23 of 49 samples exceed the criterion for Chloride. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when chloride exceeds 106 mg/L in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51584 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 28 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 28 of 41 samples exceed the criterion for Chloride. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when chloride exceeds 106 mg/L in irrigation supply water. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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 |
84154 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Enterococcus |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2027 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | No new data were assessed. This is a new/revised decision to replace the decisions made for the generic pollutant category of 'Pathogen'.
This pollutant is being considered for placement on the CWA section 303(d) List under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Eleven of 39 samples exceed the evaluation standard (Ambient Water Quality Criteria for Bacteria, USEPA, 1986) set to protect for water contact recreation (i.e. swimming, wading etc.) and 0 of 39 samples exceed the water quality objective for non-contact recreation. 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 of 39 samples exceed the evaluation guideline set to protect for water contact recreation (i.e. swimming, wading etc.) 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 14170 | ||||
Pollutant: | Enterococcus | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 39 samples exceed the criterion for Enterococci. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. Enterococcus is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 14154 | ||||
Pollutant: | Enterococcus | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 11 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows:11 of 39 samples exceed the criterion for Enterococci. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for Enterococci in freshwater is 61 MPN/100mL (as stated in Table 4, page 15). | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.]. | ||||
Temporal Representation: | Data was collected monthly over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
84189 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Escherichia coli (E. coli) |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2027 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This is a new/revised decision to replace the decisions made for the generic pollutant category of 'Pathogen'.
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. Eleven lines of evidence are available in the administrative record to assess this pollutant. Seventy-four of 190 samples exceed the evaluation standard (Ambient Water Quality Criteria for Bacteria, USEPA, 1986) set to protect for water contact recreation (i.e. swimming, wading etc.) and 2 of 150 samples exceed the water quality objective for non-contact recreation. 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. Seventy-four of 190 samples exceed the evaluation guideline set to protect for water contact recreation (i.e. swimming, wading etc.) 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: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 51563 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 40 | ||||
Number of Exceedances: | 16 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 16 of 40 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15 of the USEPA Ambient Water Quality Criteria for Bacteria -1986). | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10169 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 13 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 13 of 60 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15) | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10397 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 26 | ||||
Number of Exceedances: | 13 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 13 of 26 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15) | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 19824 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 15 | ||||
Number of Exceedances: | 10 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 10 of 15 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15) | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 3 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304WGP_SCC - SLR at WATERMAN GAP] | ||||
Temporal Representation: | Data was collected over the time period 2/5/2001-2/28/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 14030 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 20 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 20 of 39 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15) | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18461 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 10 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. E. coli is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River, 304-SANLO-26 - Garden of Eden] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/7/2005. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 10398 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 26 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 26 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. E. coli is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 14031 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 39 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Central Coast Long Term Environmental Assessment Program (R3_CCLEAN) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 39 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCLEAN (Central Coast Long Term Environmental Assessment Program data) Water Quality Data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. E. coli is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304SNL_CCL - San Lorenzo River at Laurel St.] | ||||
Temporal Representation: | Data was collected over the time period 1/25/2002-6/20/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | EPA Approved QAPP. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 18460 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 10 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986. | ||||
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15) | ||||
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River, 304-SANLO-26 - Garden of Eden] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/7/2005. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
|
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LOE ID: | 10170 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. E. coli is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 19825 | ||||
Pollutant: | Escherichia coli (E. coli) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 15 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 15 samples exceed the criterion for Escherichia coli. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. E. coli is a fecal coliform. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 3 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304WGP_SCC - SLR at WATERMAN GAP] | ||||
Temporal Representation: | Data was collected over the time period 2/5/2001-2/28/2005. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76971 |
Region 3 |
San Lorenzo River |
||
Pollutant: | PCBs (Polychlorinated biphenyls) |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2027 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under sections 2.1 and 3.1 of the Listing Policy.
Two lines of evidence are available in the administrative record to assess this pollutant. Based on section 3.1 the site exceeded numeric objectives for toxic pollutants. Using the binomial distribution, waters shall be placed on the section 303(d) list if the number of measured exceedances supports rejection of the null hypothesis as presented in Table 3.1. Three of the nine samples exceed the Human Health Criteria (USEPA, 40 CFR, May 2000) and this supports rejection of the null hypothesis. 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 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. Three of the nine samples exceed the Human Health Criteria (USEPA, 40 CFR, May 2000) and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 29951 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. Three of nine samples exceed the Human Health Criteria. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Human Health Criteria, for the consumption of water, set for PCB's is 0.00017 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000)). | ||||
Objective/Criterion Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 29952 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Fish Migration | Fish Spawning | Preservation of Rare & Endangered Species | Warm Freshwater Habitat | Wildlife Habitat | ||||
Number of Samples: | 9 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Nine samples were analyzed by solid phase extraction after an approximately 30 day exposure, in-situ, to known volumes of water. Nine separate sample events were conducted by CCLEAN staff. None of the nine samples exceed the Criteria Continuous Concentration for PCB's. | ||||
Data Reference: | Final Data CCLEAN Mussel Tissue and Solid Phase Extraction data | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentration which are toxic to, or which produce detrimental physiological responses in human, plant, animal, or aquatic life (Central Coast Water Quality Control Plan, general Objective, Section II.A.2.a). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | The Criteria Continuous Concentration (CCC) or the the highest concentration of a pollutant to which aquatic life can be exposed for an extended period of time (4 days) without deleterious effects for PCB's is 14.0 ug/L (USEPA. Federal Register, 40 CFR Part 131 (Vol.65, No. 97. May 18, 2000.) ) | ||||
Guideline Reference: | Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California; Rule. 40 CFR Part 131. U.S. Environmental Protection Agency, Region IX, Water Division, San Francisco, CA | ||||
Spatial Representation: | Single sample location, San Lorenzo River, adjacent to USGS gauging station on west shore (Lat, N 36.9909, Long, W 122.0313) | ||||
Temporal Representation: | Nine separate (approximate 30 day) sample events. The first was initiated on October 3rd, 2002 and the ninth on September 8th 2006. | ||||
Environmental Conditions: | Water from the sample source (i.e., river) is pumped sequentially through a 0.45 micron glass-fiber particle filter, then through a column packed with XAD-2 resin beads, to which nonpolar compounds adsorb. Sampling rates are set to optimum volumes to ensure maximum extraction of target compounds from the sample water. Samples are pumped on a flow-proportioned basis to achieve the desired sample volumes over an approximately 30-day period. This requires predictions of total river discharges during the sampling period, which predictions are not always borne out, resulting in either longer sampling periods or higher or lower than the targeted sample volume. Higher sample volumes provide lower analytical detection limits. Both the particle filter and resin beads are extracted in the laboratory and the extracts are combined and analyzed to provide a total concentration of each compound in the extracted volume of water. | ||||
QAPP Information: | CCLEAN has an approved QAPP | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
76471 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Sodium |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | Hydromodification | Other |
Expected TMDL Completion Date: | 2027 |
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.
Two lines of evidence are available in the administrative record to assess this pollutant. Fifty of the 90 samples exceed the water quality objective for agricultural uses. However, all exceedances of this objective occurred at a single station (304LOR - San Lorenzo River at Laurel Street). This location is tidally influenced and within the modified reach that was historically channelized. A recent monitoring data summary (for the county of Santa Cruz) states the following: "During periods of macrotidal circulation with strong tidal influence (May through July 2008), water quality parameters (surface and bottom water temperature, salinity, and DO and bottom water pH and ORP) mimic the up and down patter of the tides." 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. Fifty of the 90 samples exceed the water quality objective 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. However, all exceedances of this objective occurred at a single station which is tidally influenced. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 9202 | ||||
Pollutant: | Sodium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 49 | ||||
Number of Exceedances: | 23 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 23 of 49 samples exceed the criterion for Sodium. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when sodium exceeds 69 mg/L in irrigation supply water. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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|||||
LOE ID: | 51598 | ||||
Pollutant: | Sodium | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Agricultural Supply | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 27 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 27 of 41 samples exceed the criterion for Sodium. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Waters shall not contain concentrations of chemical constituents in amounts which adversely affect the agricultural beneficial use. Interpretation of adverse effect shall be as derived from the University of California Agricultural Extension Service guidelines provided in Table 3-3 (Central Coast Waterboard Basin Plan, Chapter III, Section II.A.2 Objectives for all Inland and Surface Waters, Enclosed Bays and Estuaries). In Table 3-3 of the Basin Plan (page III-8), water quality guidelines state that severe problems may occur when sodium exceeds 69 mg/L in irrigation supply water. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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 |
85620 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Temperature, water |
Final Listing Decision: | List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
Expected TMDL Completion Date: | 2023 |
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.
Eight lines of evidence are available in the administrative record to assess this pollutant. Seven LOEs summarize 5861 grab samples and 310 of these samples exceeds the evaluation guideline (optimum range for steelhead should not exceed 21 degrees, Moyle, 1976). However, San Lorenzo River provides habitat for Coho salmon and steelhead trout, which are listed as a threatened species under the federal Endangered Species Act. LOE 57810 summarizes continuous temperature measurements which are evaluated by calculating maximum weekly maximum temperature (MWMT). These measurements were collected throughout the summer rearing season (in most cases covering the months of June through September in 2005 and or 2006) at ten different monitoring stations. The MWMT does exceed the evaluation guideline for Coho Salmon applied to long term continuous temperature data (MWMT for Central Coast Coho, NOAA, 2012) used to interpret the narrative water quality objective. For reference, both the 16 degree MWMT and the 18 degree MWMT was exceeded at 14 of the 17 stations/seasons during the period of measurement. Eighteen degrees is the EPA temperature criterion for non-core salmon and trout. However, for this assessment, the 16 degree MWMT is used as it is more appropriate and protective for this water body. 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. Both the 16 degree MWMT and the 18 degree MWMT evaluation guidelines were exceeded at 14 of the 17 stations/seasons during the period of measurement.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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 11991 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 56 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 7 of 56 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 12043 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 60 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 57810 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 17 | ||||
Number of Exceedances: | 14 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Data collected by City of Santa Cruz and Donald Ally at 10 different locations on the San Lorenzo River during 2005 and 2006. Note that data was not collected both years at all 10 sites. In 14 out of 17 data sets (one continuous season of temperature data for a single location), the temperature exceeded the evaluation guideline (MWMT greater than16 degrees) for the summer rearing season at least one day during the period of record. Staff also evaluated the MWMT compared to the evaluation guideline for the protection of juvenile steelhead trout (MWMT greater than18degrees) and in14 of the 17 data sets the temperature also exceeded the 18 degree evaluation guideline. | ||||
Data Reference: | Data for temperature in San Lorenzo Creek (Monterey County) and other water bodies, May 2005-Aug. 2009 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Per the Central Coast Coho Salmon Recovery Plan, Vol III, pages 55-56 (NOAA, 2012) population level temperature rating of 16 degrees C (temperature expressed as maximum weekly maximum temperature or MWMT) are protective of juvenile coho during rearing season (summer). This threshold is protective of chronic exposure to elevated water temperatures which can result decline and absence of juvenile coho in habitats. This is also consistent with the 'U.S. EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards' (USEPA 2003), in which the U.S. EPA recommends a criterion for the protection of moderate to high density summertime salmon and trout juvenile rearing (i.e., core juvenile rearing) of a maximum weekly maximum temperature (MWMT) of 16 degrees C. The MWMT is also known as the maximum 7-day average of daily maximums (7DADM).
The 16 degrees C MWMT criterion is recommended to (1) safely protect juvenile salmon and trout from lethal temperatures; (2) provide upper optimal conditions for juvenile growth under limited food during the period of summer maximum temperatures and optimal temperatures for other times of the growth season; (3) avoid temperatures where juvenile salmon and trout are at a competitive disadvantage with other fish; (4) protect against temperature induced elevated disease rates; and (5) provide temperatures that studies show juvenile salmon and trout prefer and are found in high densities. Both the CDFG and NOAA support the use of the USEPA temperature guidance for the purposes of water quality assessment in California. These criteria have been adopted by both Oregon and Washington state and used for 303(d) Listing and TMDL development by the North Coast Region Water Quality Control Board. |
||||
Guideline Reference: | EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA. | ||||
Guideline Reference: | NOAA - Final Recovery Plan for Central California Coast coho salmon (Oncorhynchus kisutch) Evolutionarily Significant Unit. | ||||
Spatial Representation: | Ten sites in the San Lorenzo River were monitored, San Lorenzo River-1 (Paradise Park), San Lorenzo River-(Rincon Reach- Henry Cowell Park below Gorge), San Lorenzo River-3 (Gorge- Henry Cowell Park below Eagle Creek), San Lorenzo River-4b (Upper Henry Cowell Park between Bridge and Gold Gulch), San Lorenzo River-6 (Felton below Fall Creek confluence), San Lorenzo River-7 (Ben Lomond above Love Creek confluence), San Lorenzo River-8 (Brookdale between Clear Creek confluence and Larkspur Bridge)San Lorenzo River-10 (North end of Brimblecom Road, upstream of Two Bar confluence), San Lorenzo River-11 (just upstream of Teihl Road Bridge), San Lorenzo River-12b (Waterman Gap upstream of Highway 9 Bridge). All ten sites are located upstream of Highway 1 and the flood control channel. | ||||
Temporal Representation: | Samples were collected throughout the summer rearing season (in most cases covering the months of June through September) in 2005 and or 2006. | ||||
Environmental Conditions: | |||||
QAPP Information: | There was no QAPP submitted with this data, but detailed letters outlining QA/QC procedures were provided by the City of Santa Cruz and Donald Alley. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 17400 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 100 | ||||
Number of Exceedances: | 7 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Monterey Area Research Consortium (R3_MARC) data for San Lorenzo River to determine beneficial use support and results are as follows: 7 of 100 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: Marc Los Huertos Water Quality Data, file A | ||||
Final Data File used for assessment: Marc Los Huertos Water Quality Data, file B | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 2 monitoring sites [ SL-SOQ SL-BRO - San Lorenzo River at Broadway] | ||||
Temporal Representation: | Data was collected over the time period 2/13/2002-12/27/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | Regional Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 18615 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 14 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Coastal Watershed Council (Snapshot day monitoring) (R3_Snap) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 14 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: Monterey Bay National Marine Sanctuary Volunteer Monitoring Network Data. 2003-2006 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304-SANLO-22 - San Lorenzo River Mouth, 304-SANLO-26 - Garden of Eden, 304-SANLO-21 - San Lorenzo River Downtown, 304-SANLO-27 - Junction Park - San Lorenzo River] | ||||
Temporal Representation: | Data was collected over the time period 5/17/2003-5/6/2006. Coastal Watershed Council Snapshot Day Monitoring is conducted annually. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | State Board approved QAPP. Multiple errors were identified in data and were flagged or fixed by RB staff (in communication with Project staff) prior to assessment of data. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 12024 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 12 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Diurnal Dissolved Oxygen Sampling (DO) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 12 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 5 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 7/6/2001-8/26/2005. Diurnal monitoring conducted in summer months at all CCAMP monitoring sites. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 19859 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 5578 | ||||
Number of Exceedances: | 283 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 283 of 5578 samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (General Objective in Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 13 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE, 304SLA_SCC - SLR ABOVE LOVE CR., 304SLB_SCC - SLR BELOW BOULDER CR., 304WGP_SCC - SLR at WATERMAN GAP, 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLR_SCC - SLR at RIVER ST., B.C., 304SLP_SCC - SLR at PACIFIC AVE., BROOKDALE, 304SLF_SCC - SLR at FERN DR., S.L. WOODS] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-8/7/2006. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 51548 | ||||
Pollutant: | Temperature, water | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 11 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 11 of 41 grab samples exceed the criterion for Water Temperature. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | Natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such alteration in temperature does not adversely affect beneficial uses (Basin Plan). | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | The optimum range for growth and completion of most life stages of rainbow trout is 13-21 degrees Celsius (Moyle 1976). | ||||
Guideline Reference: | Inland Fishes of California | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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 |
81558 |
Region 3 |
San Lorenzo River |
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Pollutant: | Chlorpyrifos |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | A Source Unknown |
TMDL Name: | San Lorenzo/Zayante Chlorpyrifos TMDL |
TMDL Project Code: | 1060 |
Date TMDL Approved by USEPA: | 11/25/2015 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | No new data were assessed. However, a TMDL has been approved by US EPA since the 2010 assessment cycle.
This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under 3.1 of the Policy, a minimum of one line of evidence is needed to assess listing status. Under 3.6, a minimum of two lines of evidence are needed to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. Two of two water samples exceed the evaluation guideline (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005) set to protect for aquatic life beneficial uses. Six of the samples collected will not be included in this sample count because the laboratory¿s method detection limit and reporting limits were greater than the evaluation guideline and the result was non-detect. Therefore the results could not be quantified with the level of certainty required by the Listing Policy. One of two sediment samples (pore water) exceeded the Evaluation Guideline (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005) applied to protect for aquatic life beneficial uses, however one of the samples method detection limit and reporting limits were greater than the evaluation guideline. The result was non-detect and will not be included in this decision. Additionally, there is no chlorpyrifos evaluation guideline specific to "sediment, interstitial water" (pore water). LOEs summarizing pore water results will not be the sole basis for any decision. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the 303(d) list because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Two of the thirteen samples exceed the evaluation guideline (Siepmann and Finlayson 2000, with minor corrections to significant figures as described in Beaulaurier et al., 2005) set to protect for aquatic life beneficial uses and these exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. The San Lorenzo/Zayante Chlorpyrifos TMDL has been approved by the USEPA on November 25, 2016. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.
After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded. Furthermore, this pollutant waterbody combination should be placed in the 'Being Addressed' portion of the 303(d) list because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 16157 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 8 | ||||
Number of Exceedances: | 2 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 2 of 8 samples exceed the criterion for Chlorpyrifos. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
Final Data File used for assessment: SWAMP Sediment Chemistry Data from Region 3 Harbors, 2004 | |||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Evaluation Guideline: | One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304LOR-San Lorenzo Estuary at Laurel Street, 304SL9-San Lorenzo River at Highway 9, 304SLB001 - San Lorenzo River at Big Trees, 304RIV-San Lorenzo River at Crossing Road] | ||||
Temporal Representation: | Data was collected over the time period 1/3/2006-5/30/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 16281 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (04SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 1 samples exceed the criterion for Chlorpyrifos. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
Final Data File used for assessment: SWAMP Sediment Chemistry Data from Region 3 Harbors, 2004 | |||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Evaluation Guideline: | One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 5/3/2006. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 16036 | ||||
Pollutant: | Chlorpyrifos | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 1 | ||||
Number of Exceedances: | 1 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP_SWAMP Monitoring (03SW3001) data for San Lorenzo River to determine beneficial use support and results are as follows: 1 of 1 samples exceed the criterion for Chlorpyrifos. | ||||
Data Reference: | Final Data File used for assessment: SWAMP Toxicity Data 2001-06 | ||||
Final Data File used for assessment: SWAMP Sediment Chemistry Data from Region 3 Harbors, 2004 | |||||
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. (Water Quality Control Plan, Central Coast Basin, Chapter III, Section II.A.2 Objectives for all Inland Surface Waters, Enclosed Bays and Estuaries). | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Objective/Criterion Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Evaluation Guideline: | One hour average maximum concentration 0.025 ug/L as stated in Sipmann and Finlayson (2000). | ||||
Guideline Reference: | Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game | ||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected on a single day 3/29/2004. SWAMP toxicity monitoring includes both water samples (collected in both winter and summer) and sediment samples (collected in spring). | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
84191 |
Region 3 |
San Lorenzo River |
||
Pollutant: | Fecal Coliform |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2016) |
Revision Status | Original |
Sources: | Collection System Failure | Domestic Animals/Livestock | Onsite Wastewater Systems (Septic Tanks) | Transient encampments | Urban Runoff/Storm Sewers |
TMDL Name: | San Lorenzo River Watershed Pathogen TMDL (including San Lorenzo River, Lompico Creek, Carbonera Creek and the San Lorenzo River Estuary) |
TMDL Project Code: | 726 |
Date TMDL Approved by USEPA: | 07/20/2011 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This is a new/revised decision to replace the decisions made for the generic pollutant category of 'Pathogen'.
This pollutant is being considered for addition to the CWA section 303(d) List under sections 2.2, 3.2 and 3.3 of the Listing Policy. Under 3.3 of the Policy, a minimum of one line of evidence is needed to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. One-hundred-sixty of 597 samples exceed the evaluation guideline set to protect for water contact recreation (i.e. swimming, wading etc.) and 11 of 597 samples exceed the water quality objective for non-contact recreation. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for adding this water segment-pollutant combination from the CWA section 303(d) List. In accordance with section 2.2 of the Policy, there is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA, and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One-hundred-sixty of 597 samples exceed the evaluation guideline set to protect for water contact recreation (i.e. swimming, wading etc.) and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. The San Lorenzo River Watershed Pathogen TMDL has been approved by USEPA on 07/20/2011. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 18789 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 439 | ||||
Number of Exceedances: | 97 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 97 of 439 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 200 MPN/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400 MPN/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 9 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304WGP_SCC - SLR at WATERMAN GAP, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLB_SCC - SLR BELOW BOULDER CR., 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-12/23/1991. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51562 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 16 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 16 of 41 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 200 MPN/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400 MPN/100 ml. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10414 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 19 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 19 of 60 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 200 MPN/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400 MPN/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10341 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Water Contact Recreation | ||||
Number of Samples: | 57 | ||||
Number of Exceedances: | 28 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 28 of 57 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for water contact recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 200 MPN/100 ml, nor shall more than ten percent of total samples during any 30-day period exceed 400 MPN/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 18790 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 439 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed Santa Cruz County Environmental Health Monitoring Program (R3_SCCEH) data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 439 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: Santa Cruz County Environmental Health data 1971-1996 | ||||
Final Data File used for assessment: Santa Cruz County Environmental Health data 1997-2006 | |||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 9 monitoring sites [ 304SLZ_SCC - SLR RIVERMOUTH at TRESTLE, 304SLT_SCC - SLR at BIG TREES, 304WGP_SCC - SLR at WATERMAN GAP, 304SLS_SCC - SLR at SYCAMORE GROVE, 304SLM_SCC - SLR at MT. CROSS BRIDGE, 304SLH_SCC - SLR at HIGHLANDS PARK, 304SLB_SCC - SLR BELOW BOULDER CR., 304SLL_SCC - SLR at LOMOND ST. BRIDGE, 304SLU_SCC - SLR at BROADWY/LAUREL ST BRIDGE] | ||||
Temporal Representation: | Data was collected over the time period 1/2/1990-12/23/1991. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | This monitoring program has been underway for thirty years, with changes over time to protocols, level of QA, and documentation. In general, QA documentation included with the dataset is minimal. However, data quality appears to be reasonably good. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 51575 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 41 | ||||
Number of Exceedances: | 5 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Water Board Staff assessed public submissions data for San Lorenzo River to determine beneficial use support and results are as follows: 5 of 41 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Coastal Confluences field data 2007-2010 | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. | ||||
Objective/Criterion Reference: | Data for Various Pollutants in Westside San Joaquin Water Quality Coalition, 2004-2009. | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR -San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 1/16/2007-6/14/2010. | ||||
Environmental Conditions: | Central Coast Water Board Staff are not aware of any special conditions that might affect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). All data are flagged as appropriate. | ||||
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) | ||||
|
|||||
LOE ID: | 10342 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 57 | ||||
Number of Exceedances: | 3 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Coastal Confluences (CC) data for San Lorenzo River to determine beneficial use support and results are as follows: 3 of 57 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 1 monitoring site [ 304LOR-San Lorenzo Estuary at Laurel Street] | ||||
Temporal Representation: | Data was collected over the time period 5/1/2001-12/18/2006. CCAMP Coastal confluence monitoring is conducted monthly (with the exception of April 2003 - December 2003) and is ongoing. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||
|
|||||
LOE ID: | 10415 | ||||
Pollutant: | Fecal Coliform | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Non-Contact Recreation | ||||
Number of Samples: | 60 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PATHOGEN MONITORING | ||||
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed CCAMP Pajaro (Pajaro) data for San Lorenzo River to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Coliform, Fecal. | ||||
Data Reference: | Final Data File used for assessment: CCAMP Water Quality Data_file1 | ||||
Final Data File used for assessment: CCAMP Water Quality Data_file2 | |||||
Final Data File used for assessment: CCAMP Water Quality Data_file3 | |||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | The Water Quality Control Plan, Central Coast Basin objective for non-contact water recreation uses (Section II.A.2. Objectives for All Inland Surface Waters, Enclosed Bays, and Estuaries, II.A.2.a) states the following: Fecal coliform concentration, based on a minimum of not less than five samples for any 30-day period, shall not exceed a log mean of 2000/100 ml, nor shall more than ten percent of samples collected during any 30-day period exceed 4000/100 ml. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - Central Coast Region (Region 3) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Data for this line of evidence for San Lorenzo River was collected at 4 monitoring sites [ 304RIV-San Lorenzo River at Crossing Road, 304SL9-San Lorenzo River at Highway 9, 304SLB-San Lorenzo River at Big Trees, 304SLE-San Lorenzo above Bear Creek] | ||||
Temporal Representation: | Data was collected over the time period 1/20/2005-3/8/2006. Pajaro watershed is one of five annual rotation areas that are monitored for conventional pollutants by CCAMP staff monthly for one year. | ||||
Environmental Conditions: | Staff is not aware of any special conditions that might effect interpretation of the data. | ||||
QAPP Information: | All data was collected following the Standard Operating Procedures and Data Quality Objectives outlined in the SWAMP QAMP, (Puckett, 2002). QA data are included in submission. All data are flagged as appropriate. | ||||
QAPP Information Reference(s): | |||||