Water Body Name: | Pixley Slough (San Joaquin County; partly in Delta Waterways, eastern portion) |
Water Body ID: | CAR5312000020080803212723 |
Water Body Type: | River & Stream |
Lines of Evidence (LOEs) for Decision ID 10248 |
LOE ID: | 8557 |
Pollutant: | Arsenic |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 13 |
Number of Exceedances: | 0 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Zero of the 13 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Arsenic. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) Dissolved Arsenic levels should not exceed 340 ug/L maximum concentration for 1-hour average (CTR) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Compilation of Water Quality Goals | |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Jun 26 2001 to Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): | |
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LOE ID: | 20295 |
Pollutant: | Arsenic |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 17 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 17 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Arsenic. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Arsenic levels should not exceed 10 ug/L (USEPA Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Jun 26 2001 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10250 |
LOE ID: | 20773 |
Pollutant: | Boron |
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: | 0 of the 20 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Boron. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Boron levels should not exceed 1000 ug/L (Department of Health Services Health Advisory) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10252 |
LOE ID: | 8559 |
Pollutant: | Cadmium |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 11 |
Number of Exceedances: | 0 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Zero of the 11 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Cadmium. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) Dissolved Cadmium levels should not exceed the calculated limit based on the formula: Criteria Maximum Concentration (1-hour Average dissolved)=(EXP(1.128*LN(hardness)-3.6867))*(1.136672-(LN(hardness)*0.041838)) (CTR) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Compilation of Water Quality Goals | |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Aug 28 2001 to Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): | |
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LOE ID: | 20445 |
Pollutant: | Cadmium |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 17 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 17 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Cadmium. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Cadmium levels should not exceed 5 ug/L (Department of Public Health Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Jun 26 2001 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10254 |
LOE ID: | 20774 |
Pollutant: | Chloride |
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: | 0 of the 20 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Chloride. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Chloride levels should not exceed 250 mg/L (USEPA Maximum Contaminant Level) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10255 |
LOE ID: | 20489 |
Pollutant: | Chromium (total) |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 23 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 23 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Chromium. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Chromium levels should not exceed 50 ug/L (Department of Public Health Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 14876 |
LOE ID: | 26183 |
Pollutant: | Dimethoate |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 8 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Eight individual water samples were collected from Pixley Slough at Ham Lane, under the Pesticide TMDL program between January and April 2006. None of the 8 water samples exceeded the dimethoate Evaluation Guideline of 0.2 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Where valid testing has developed 96 hour LC50 values for aquatic organisms (the concentration that kills one half of the test organisms in 96 hours), the Board will consider one tenth of this value for the most sensitive species tested as the upper limit (daily maximum) for the protection of aquatic life. Other available technical information on the pesticide (such as Lowest Observed Effect Concentrations and No Observed Effect Levels), the water bodies and the organisms involved will be evaluated to determine if lower concentrations are required to meet the narrative objectives. The one-tenth of 96-hour LC50 value for dimethoate for the most sensitive species in freshwater (Cyclops strenuus, a copepod crustacean), is 0.2 ug/L. |
Guideline Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
ECOTOX database, aquatic data. U. S. Environmental Protection Agency | |
Spatial Representation: | Samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Water samples were collected from Pixley Sough at Ham Lane on: January 14 and 15, 2006; February 28, 2006; March 1, 14, and 28,, 2006; and April 11 and 25, 2006. |
Environmental Conditions: | |
QAPP Information: | Data Quality: Good. Monitoring was conducted in accordance with an approved QAPP. |
QAPP Information Reference(s): | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
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LOE ID: | 26182 |
Pollutant: | Dimethoate |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 21 |
Number of Exceedances: | 1 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Twenty-seven individual water samples were collected from Pixley Slough, under the Irrigated Lands Reporting Program, at two sites, between July 2004 and July 2005. Since six of the samples collected at Eightmile Road were duplicates, there are 21 daily-averaged dimethoate results.
One of the 21 water samples (collected at Eightmile Road on July 28, 2004) exceeded the Evaluation Guideline of 0.2 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Where valid testing has developed 96 hour LC50 values for aquatic organisms (the concentration that kills one half of the test organisms in 96 hours), the Board will consider one tenth of this value for the most sensitive species tested as the upper limit (daily maximum) for the protection of aquatic life. Other available technical information on the pesticide (such as Lowest Observed Effect Concentrations and No Observed Effect Levels), the water bodies and the organisms involved will be evaluated to determine if lower concentrations are required to meet the narrative objectives. The one-tenth of 96-hour LC50 value for dimethoate for the most sensitive species in freshwater (Cyclops strenuus, a copepod crustacean), is 0.2 ug/L. |
Guideline Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
ECOTOX database, aquatic data. U. S. Environmental Protection Agency | |
Spatial Representation: | Samples were collected from Pixley Slough at Eightmile Road and Ham Lane. |
Temporal Representation: | Water samples were collected from Pixley Sough at Eightmile Road on July 14 and 28, 2004; August 11 and 25, 2004; September 8, 2004; daily from January 27 to February 1, 2005; February 4, 15, and 16, 2005; June 16 and 30, 2005; and July 14 and 28, 2005.
Water samples were collected from Pixley Sough at Ham Lane on June 16 and 30, 2005, and on July 14 and 28, 2005. |
Environmental Conditions: | |
QAPP Information: | Data Quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826 ) requirements. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 13563 |
LOE ID: | 21852 |
Pollutant: | Malathion |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 16 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 27 water samples were collected from Pixley Slough from July 2004 through July 2005, representing 16 4-day average concentrations and 27 1-hour average concentrations.0 of 16 4-day average concentrations exceeded the 4-day CMC (0.43 ug/L).0 of 27 1-hour average concentrations exceeded the CCC (0.1 ug/L). |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses (CVRWQCB, 2007).All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life (CVRWQCB, 2007). |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Quality Criteria for Water. USEPA Office of Water and Hazardous Materials. Washington, D.C | |
Evaluation Guideline: | US EPA recommended criterion continuous concentration (CCC) 0.1 ug/L (US EPA, 1976). California Department of Fish and Game Hazard Assessment Criterion is 0.43 ug/L for criterion maximum concentration (CMC) (CDFG, 1998) |
Guideline Reference: | Hazard Assessment of the Insecticide Malathion to Aquatic Life in the Sacramento-San Joaquin River System. California Department of Fish and Game. Office of Spill Prevention and Response Administrative Report 98-2 |
Spatial Representation: | Samples were collected from Pixley Slough at Eightmile Road and at Ham Ln. |
Temporal Representation: | Samples were collected at variable intervals (e.g. daily or two-weekly, monthly) from July 2004 through July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10258 |
LOE ID: | 20495 |
Pollutant: | Nickel |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 23 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 23 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Nickel. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Nickel levels should not exceed 100 ug/L (Department of Public Health Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Jun 24 2003 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): | |
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LOE ID: | 8563 |
Pollutant: | Nickel |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Dissolved |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 15 |
Number of Exceedances: | 0 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Zero of the 15 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Nickel. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) Dissolved Nickel levels should not exceed the calculated limit based on the formula: Criteria Maximum Concentration (1-hour Average, dissolved)=(EXP(0.846*LN(hardness)+2.255))*(0.998)(CTR) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Compilation of Water Quality Goals | |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Feb 20 2001 to Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10260 |
LOE ID: | 8564 |
Pollutant: | Nitrate as Nitrate (NO3) |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 9 |
Number of Exceedances: | 0 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Zero of the 9 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation guideline for Nitrate-N. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Nitrate-N levels should not to exceed 100 mg/L (USEPA National Ambient Water Quality Objective) |
Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology. 4304T |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Oct 23 2001 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): | |
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LOE ID: | 21018 |
Pollutant: | Nitrate as Nitrate (NO3) |
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: | 0 of the 9 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Nitrate-N. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Nitrate-N levels should not exceed 45 mg/L (Department of Public Health Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Oct 23 2001 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 13565 |
LOE ID: | 23005 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Sediment |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 2 |
Number of Exceedances: | 0 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | Zero of the two samples tested with Hyalella azteca were toxic. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a t-test with 10-day Hyalella azteca sediment toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Eight Mile Road. |
Temporal Representation: | Samples were collected from April 2005 to August 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10262 |
LOE ID: | 20286 |
Pollutant: | Selenium |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 1 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 1 sample collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Selenium. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Selenium levels should not exceed 50 ug/L (Department of Public Health Primary MCL) |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | The sample was collected at Pixley Slough at Davis Road. |
Temporal Representation: | The sample was collected on Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): | |
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LOE ID: | 8566 |
Pollutant: | Selenium |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 1 |
Number of Exceedances: | 0 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Zero of the 1 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Selenium. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) Selenium levels should not to exceed 5 ug/L (CTR) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 29 2002 to Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10263 |
LOE ID: | 20971 |
Pollutant: | Specific Conductivity |
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: | 0 of the 56 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Specific Conductivity. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | The water quality objective used was the California Secondary MCL recommended level of 900 uS/cm. The Basin Plan includes chemical constituent water quality objectives that include (by reference) secondary maximum contaminant levels (MCLs) protective of MUN (CVRWQCB, 2007a).The secondary MCLs for electrical conductivity provide a range of values including a recommended level (900 uS/cm), upper level (1600 uS/cm) and a short-term level (2200 uS/cm). The recommended concentration was used as it is intended to be protective of all drinking water uses. |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Nov 29 2005 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 10265 |
LOE ID: | 20394 |
Pollutant: | Total Dissolved Solids |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 10 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 0 of the 10 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Total Dissolved Solids. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CRWQCB, 2006) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | The water quality objective used was the California Secondary MCL recommended level of 500 mg/L. The Basin Plan includes chemical constituent water quality objectives that include (by reference) secondary maximum contaminant levels (MCLs) protective of MUN (CVRWQCB, 2007a).The secondary MCLs for TDS provide a range of values including a recommended level (500 mg/L), upper level (1000 mg/L) and a short-term level (1500 mg/L). The recommended concentration was used as it is intended to be protective of all drinking water uses. |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Oct 29 2002 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 9170 |
LOE ID: | 8565 |
Pollutant: | pH |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Cold Freshwater Habitat |
Number of Samples: | 55 |
Number of Exceedances: | 2 |
Data and Information Type: | Not Specified |
Data Used to Assess Water Quality: | Two of the 55 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for pH. The exceeded results are as follows: 6/23/2004 - a sample taken at Pixley Slough at Davis Road had a result of 9.4none. 7/28/2004 - a sample taken at Pixley Slough at Davis Road had a result of 8.8none. |
Data Reference: | San Joaquin River SWAMP Monitoring Data - Drainage Basin Inflows |
Water Quality Objective/Criterion: | pH levels should not be lower than 6.5 or higher than 8.5 (Basin Plan Objective) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected at Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from Oct 24 2000 to Nov 29 2005 |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 12552 |
LOE ID: | 23019 |
Pollutant: | Chlorpyrifos |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 4 |
Number of Exceedances: | 2 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Four water samples were collected from Pixley Slough during two winter storms in 2006, representing two calculated 4-day average chlorpyrifos concentrations and four 1-hour average chlorpyrifos concentrations. Two of the four 1-hour average chlorpyrifos concentrations exceeded the 1-hour average chlorpyrifos criterion of 0.025 ug/L. One of two calculated 4-day average chlorpyrifos concentrations exceeded the 4-day average chlorpyrifos criterion of 0.015 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Chlorpyrifos Criteria: 0.015 ug/L as a 4-day average chlorpyrifos concentration, and 0.025 ug/L as a 1-hour average chlorpyrifos concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Samples were collected daily during two storm events in 2006. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Calanchini, H. 2006. Quality Assurance Project Plan, Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. John Muir Institute of the Environment, U.C. Davis. Davis, CA. |
QAPP Information Reference(s): | Quality Assurance Project Plan. Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. Final. SWAMP Project ID 02TM5001 (Revision 0.0). John Muir Institute of the Environment, U.C. Davis. Davis, CA. January 26, 2006 |
| |
LOE ID: | 23021 |
Pollutant: | Chlorpyrifos |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 16 |
Number of Exceedances: | 5 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Twenty-three water samples were collected from Pixley Slough at Eightmile Road, and four samples were collected from Pixley Slough at Ham Lane in 2004 and 2005, together representing sixteen calculated 4-day average chlorpyrifos concentrations and twenty-seven 1-hour average chlorpyrifos concentrations. Five of the sixteen calculated 4-day average chlorpyrifos concentrations exceeded the 4-day average chlorpyrifos criterion of 0.015 ug/L. Nine of the twenty-seven 1-hour average chlorpyrifos concentrations exceeded the 1-hour average chlorpyrifos criterion of 0.025 ug/L. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Chlorpyrifos Criteria: 0.015 ug/L as a 4-day average chlorpyrifos concentration, and 0.025 ug/L as a1-hour average chlorpyrifos concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Eightmile Road (23 samples) and at Ham Lane (4 samples). |
Temporal Representation: | Samples were collected bimonthly in July and August 2004, once in September 2004, and twice daily for four days during a storm in January 2005. Additionally, samples were collected twice daily for two days in February, and during two other days in February. Samples were also collected twice in June 2005 and twice in July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): | |
| |
LOE ID: | 23020 |
Pollutant: | Chlorpyrifos |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 4 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Four water samples were collected from Pixley Slough, representing four calculated 4-day average chlorpyrifos concentrations and four 1-hour average chlorpyrifos concentrations. Zero of the four 1-hour average chlorpyrifos concentrations exceeded the 1-hour average chlorpyrifos criterion of 0.025 ug/L. Zero of the four calculated 4-day average chlorpyrifos concentrations exceeded the 4-day average chlorpyrifos criterion of 0.015 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Chlorpyrifos Criteria: 0.015 ug/L as a 4-day average chlorpyrifos concentration, and 0.025 ug/L as a 1-hour average chlorpyrifos concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Samples were collected every two weeks in March and April 2006. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Calanchini, H. 2006. Quality Assurance Project Plan, Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. John Muir Institute of the Environment, U.C. Davis. Davis, CA. |
QAPP Information Reference(s): | Quality Assurance Project Plan. Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. Final. SWAMP Project ID 02TM5001 (Revision 0.0). John Muir Institute of the Environment, U.C. Davis. Davis, CA. January 26, 2006 |
Lines of Evidence (LOEs) for Decision ID 12550 |
LOE ID: | 22954 |
Pollutant: | Diazinon |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 16 |
Number of Exceedances: | 3 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Twenty-three water samples were collected from Pixley Slough at Eightmile Road and four samples were collected from Pixley Slough at Ham Lane in 2004 and 2005, representing sixteen calculated 4-day average diazinon concentrations and twenty-seven 1-hour average diazinon concentrations. Three of the sixteen available calculated 4-day average diazinon concentrations exceeded the 4-day average diazinon criterion of 0.100 ug/L. Thirteen of the twenty-seven available 1-hour average diazinon concentrations exceeded the 1-hour average diazinon criterion of 0.160 ug/L. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Diazinon Criteria: 0.160 ug/L as a 1-hour average concentration, and 0.100 ug/L as a 4-day average concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Eightmile Road (23 samples) and at Pixley Slough at Ham Lane (4 samples). |
Temporal Representation: | Samples were collected bimonthly in July and August 2004, one time in September 2004, and twice daily for four days during a storm in January 2005. Additionally, samples were collected twice daily for two days in February, and during two other days in February. Samples were also collected bimonthly in June and July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): | |
| |
LOE ID: | 22952 |
Pollutant: | Diazinon |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 2 |
Number of Exceedances: | 2 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Four water samples were collected from Pixley Slough during two winter storms in 2006, representing two calculated 4-day average diazinon concentrations and four 1-hour average diazinon concentrations. Zero of the four available 1-hour average diazinon concentrations exceeded the 1-hour average diazinon criterion of 0.160 ug/L. Two of the two calculated 4-day average diazinon concentrations exceeded the 4-day average diazinon criterion of 0.100 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Diazinon Criteria: 0.160 ug/L as a 1-hour average concentration, and 0.100 ug/L as a 4-day average concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Samples were collected at daily intervals during two storm events in 2006. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Calanchini, H. 2006. Quality Assurance Project Plan, Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. John Muir Institute of the Environment, U.C. Davis. Davis, CA. |
QAPP Information Reference(s): | Quality Assurance Project Plan. Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. Final. SWAMP Project ID 02TM5001 (Revision 0.0). John Muir Institute of the Environment, U.C. Davis. Davis, CA. January 26, 2006 |
| |
LOE ID: | 22953 |
Pollutant: | Diazinon |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 4 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Four water samples were collected from Pixley Slough at biweekly intervals, representing four calculated 4-day average diazinon concentrations and four 1-hour average diazinon concentrations. Zero of the four 1-hour average diazinon concentrations exceeded the 1-hour average diazinon criterion of 0.160 ug/L. Zero of the four calculated 4-day average diazinon concentrations exceeded the 4-day average diazinon criterion of 0.100 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
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 |
Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region | |
Evaluation Guideline: | California Department of Fish and Game Hazard Assessment Diazinon Criteria: 0.160 ug/L as a 1-hour average concentration, and 0.100 ug/L 4-day average concentration, not to be exceeded more than once every three years. |
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: | Samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Samples were collected every two weeks in March and April 2006. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Calanchini, H. 2006. Quality Assurance Project Plan, Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. John Muir Institute of the Environment, U.C. Davis. Davis, CA. |
QAPP Information Reference(s): | Quality Assurance Project Plan. Sacramento and San Joaquin River Basins and Sacramento-San Joaquin Delta TMDL Monitoring for Organophosphorus Pesticides and Other Pesticides Identified as Posing a High Risk to Surface Waters. Final. SWAMP Project ID 02TM5001 (Revision 0.0). John Muir Institute of the Environment, U.C. Davis. Davis, CA. January 26, 2006 |
Lines of Evidence (LOEs) for Decision ID 14400 |
LOE ID: | 26118 |
Pollutant: | Disulfoton |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 27 |
Number of Exceedances: | 4 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Twenty-seven water samples were collected from Pixley Slough, under the Irrigated Lands Regulatory Program, between July 2004 and July 2005. Four of the 27 samples exceeded the Evaluation guideline of 0.05 ug/L. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports | |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | USEPA National Ambient Water Quality Disulfoton Criterion for freshwater aquatic life protection, maximum concentration of 0.05 ug/L. |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Water samples were collected from Pixley Slough at Ham Lane and at Eightmile Road. |
Temporal Representation: | Water samples were collected from Pixley Slough daily, every other week, or monthly between July 2004 and July 2005. |
Environmental Conditions: | |
QAPP Information: | Data Quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826 ) requirements. |
QAPP Information Reference(s): | |
| |
LOE ID: | 26117 |
Pollutant: | Disulfoton |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 8 |
Number of Exceedances: | 3 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Eight water samples were collected from Pixley Slough, under the Pesticide TMDL program, between January and April 2006. Three of the 8 samples exceeded the Evaluation guideline of 0.05 ug/L. |
Data Reference: | Zipped file of Central Valley Waterways Pesticide TMDL monitoring data spreadsheets and reports |
Water Quality Objective/Criterion: | No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | USEPA National Ambient Water Quality Criterion for freshwater aquatic life protection, maximum concentration of 0.05 ug/L. |
Guideline Reference: | Compilation of Water Quality Goals |
Spatial Representation: | Water samples were collected from Pixley Slough at Ham Lane. |
Temporal Representation: | Water samples were collected from Pixley Slough on 14 and 15 January 2006, 28 February 2006, 1 March 2006, and 11 and 25 April 2006. |
Environmental Conditions: | |
QAPP Information: | Data Quality: Good. All sampling, analysis and QA/QC protocols are described in a QAPP (Calanchini et al., 2006). |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 12549 |
LOE ID: | 23004 |
Pollutant: | Escherichia coli (E. Coli) |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | None |
Beneficial Use: | Water Contact Recreation |
Number of Samples: | 30 |
Number of Exceedances: | 16 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | The Central Valley Regional Water Quality Control Board Surface Water Ambient Monitoring Program collected 30 samples from July 2002 to November 2005. Sixteen out of 30 samples exceeded the evaluation objective. |
Data Reference: | Monitoring Data from the Surface Water Ambient Monitoring Program (SWAMP), San Joaquin River Basin - 2007 Data Review |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. The objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 | |
Evaluation Guideline: | The USEPA E. Coli objective of 235/100 mL in any single sample (USEPA 1986). |
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002 |
Spatial Representation: | Samples were collected at Pixley Slough. |
Temporal Representation: | Sampling occurred from July 2002 to November 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
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) |
Lines of Evidence (LOEs) for Decision ID 12426 |
LOE ID: | 23003 |
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: | 29 |
Number of Exceedances: | 12 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | Twenty-nine samples were taken from Pixley Slough between 2004 and 2005. Twelve of the twenty-nine samples fell below the Water Quality Objective for minimum dissolved oxygen content in surface water. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | From the Sacramento/San Joaquin River Basin Plan the (COLD) Cold Freshwater Habitat is a Minimum Dissolved Oxygen content of 7mg/L |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Eightmile Road and Ham Lane in San Joaquin County. |
Temporal Representation: | Samples were collected between July 2004 and August 2005. Samples were collected at bi-monthly and monthly intervals. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 12425 |
LOE ID: | 23007 |
Pollutant: | Simazine |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Municipal & Domestic Supply |
Number of Samples: | 27 |
Number of Exceedances: | 2 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: | 27 water samples were collected from Pixley Slough from July 2004 through July 2005, representing 27 concentrations. 2 of 27 concentrations exceeded MCL (4 ug/L). |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | At a minimum, water designated for use as domestic or municipal supply (MUN) shall not contain concentrations of chemical constituents in excess of the maximum contaminant levels (MCLs) specified in the following provisions of Title 22 of the California Code of Regulations, which are incorporated by reference into this plan: Tables 64431-A (Inorganic Chemicals) and 64431-B (Fluoride) of Section 64431, Table 64444-A (Organic Chemicals) of Section 64444, and Tables 64449-A (Secondary Maximum Contaminant Levels-Consumer Acceptance Limits) and 64449-B (Secondary Maximum Contaminant Levels-Ranges) of Section 64449.
The Maximum Contaminant Level (MCL) for simazine is 4 ug/L. |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring. http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Lawbook.aspx | |
Evaluation Guideline: | |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Eightmile Road. |
Temporal Representation: | Samples were collected at variable intervals (e.g. daily, biweekly) from July 2004 through July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Good. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 12548 |
LOE ID: | 21855 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 12 |
Number of Exceedances: | 0 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | None of the 12 samples tested with Ceriodaphnia dubia were toxic and violated the narrative toxicity objective. |
Data Reference: | Monitoring Data from the Surface Water Ambient Monitoring Program (SWAMP), San Joaquin River Basin - 2007 Data Review |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a Fisher Exact analysis with 4-day acute-style toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Davis Road. |
Temporal Representation: | The samples were collected from November 2004 to November 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
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: | 21854 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 13 |
Number of Exceedances: | 0 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | Zero of the 13 samples tested with Ceriodaphnia dubia were toxic and violated the narrative toxicity objective. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a t-test with 4-day acute-style toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Eight Mile Road and Ham Lane. |
Temporal Representation: | Samples were collected in July 2004 to July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): | |
| |
LOE ID: | 23006 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 13 |
Number of Exceedances: | 1 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | One of 13 samples tested with Selenastrum capricornutum was toxic and violated the narrative toxicity objective. One sample collected at Pixley Slough at Eightmile Road exhibited a statistically significant decrease in growth compared to the control. The sample date and percent of control (in parentheses) are as follows:08 September 2004 (78) |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a t-test with 4-day chronic-style toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from two locations: Pixley Slough at Eightmile Road and Pixley Slough at Ham Lane. |
Temporal Representation: | Samples were collected from July 2004 to July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): | |
| |
LOE ID: | 23008 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 13 |
Number of Exceedances: | 0 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | None of the 13 samples tested with Pimephales promelas were toxic and violated the narrative toxicity objective. |
Data Reference: | Revised Draft of the 2007 Review of the Monitoring Data for the Irrigated Lands Regulatory Conditional Waiver Program |
Monitoring and Reporting Program, Order Nos. R5-2003-0826, R5-2005-0833, and R5-2008-0005 for Coalition Groups Under Resolution No. R5-2003-0105, Conditional Waiver of Waste Discharge Requirements for Discharges From Irrigated Lands Within the Central Valley Region | |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a t-test with 4-day acute-style toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Eight Mile Road and Ham Lane. |
Temporal Representation: | Samples were collected from July 2004 to July 2005. |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Monitoring was conducted in accordance with Central Valley Water Board Monitoring and Reporting Program (order number R5-2003-0826) requirements (CVRWQCB, 2003) |
QAPP Information Reference(s): | |
| |
LOE ID: | 23018 |
Pollutant: | Toxicity |
LOE Subgroup: | Toxicity |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Cold Freshwater Habitat |
Aquatic Life Use: | Cold Freshwater Habitat |
Number of Samples: | 12 |
Number of Exceedances: | 3 |
Data and Information Type: | TOXICITY TESTING |
Data Used to Assess Water Quality: | Three of the 12 samples tested with Pimephales promelas were toxic and violated the narrative toxicity objective. Three samples collected at Davis Road exhibited a statistically significant decrease in survival compared to the control. The sample dates and percent of control (in parentheses) are as follows:26 April 2005(88)24 May 2005 (88)28 June 2005 (85) |
Data Reference: | Monitoring Data from the Surface Water Ambient Monitoring Program (SWAMP), San Joaquin River Basin - 2007 Data Review |
Water Quality Objective/Criterion: | All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. (CVRWQCB, 2007) |
Objective/Criterion Reference: | Central Valley Regional Water Quality Control Board. Water Quality Control Plan (Basin Plan) for the California Regional Water Quality Control Board - Central Valley Region |
Evaluation Guideline: | Statistically significant difference from control using a Fisher's Exact test with 4-day acute-style toxicity tests. |
Guideline Reference: | |
Spatial Representation: | Samples were collected from Pixley Slough at Davis Road. |
Temporal Representation: | Samples were collected from November 2004 to November 2005 |
Environmental Conditions: | |
QAPP Information: | Data quality: Excellent. Monitoring was conducted in accordance with the State Water Resources Control Board's Quality Assurance Program Plan for the State of California's Surface Water Ambient Monitoring Program. |
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) |