Water Body Name: | Elk Grove Creek |
Water Body ID: | CAR5191100019980817130203 |
Water Body Type: | River & Stream |
Lines of Evidence (LOEs) for Decision ID 5216 |
LOE ID: | 2641 |
Pollutant: | Chlorpyrifos |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 18 |
Number of Exceedances: | 0 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Asses Water Quality: | Samples were collected beneath the water surface as near as possible to the center of the stream when water levels were low or when access was only possible from the bank. Otherwise, three to four grab samples were collected as one integrated grab sample. In 2001, 6 samples were taken at 3 sampling sites; all samples were non-detects (Spector et al., 2004). |
Data Reference: | Placeholder reference 2006 303(d) |
Water Quality Objective/Criterion: | The narrative pesticide objectives state, in part:
- No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses, - Discharges shall not result in pesticide concentrations in bottom sediments or aquatic life that adversely affect beneficial uses, - Pesticide concentrations shall not exceed those allowable by applicable antidegradation policies, and - Pesticide concentrations shall not exceed the lowest levels technically and economically achievable. The Basin Plans narrative water quality objective for toxicity states that '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: | Placeholder reference 2006 303(d) |
Evaluation Guideline: | CDFG Hazard Assessment Criteria - 14 ng/L 4-day average and 25 ng/L 1-hour average. |
Guideline Reference: | Placeholder reference 2006 303(d) |
Spatial Representation: | In 2001, Elk Grove Creek was monitored by the Regional Board at two sites - at Waterman Road and at Emerald Vista Drive. |
Temporal Representation: | Storm events were sampled during the orchard dormant spray season months of January and February 2001 and 2002, and January through April 2003, to determine pesticide concentrations in rain and creeks during and after the orchard dormant spray season. |
Environmental Conditions: | |
QAPP Information: | During each monitoring season, additional samples were collected for quality assurance/quality control (QA/QC) purposes. Four types of quality assurance samples were collected to confirm the integrity of analytical results reported in this three-year monitoring study. The QA/QC samples included sample duplicates, equipment blanks, matrix spikes, and matrix spike duplicates. The procedures used for collecting the QA/QC samples are based on the San Joaquin River TMDL Quality Assurance Project Plan. During this 2001-2003 study, approximately 15-25 percent of the samples collected were either equipment blanks, sample duplicates, or matrix spikes and matrix spike duplicates. |
QAPP Information Reference(s): |
Lines of Evidence (LOEs) for Decision ID 5179 |
LOE ID: | 2643 |
Pollutant: | Diazinon |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Number of Samples: | 6 |
Number of Exceedances: | 4 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Asses Water Quality: | Samples were collected beneath the water surface as near as possible to the center of the stream when water levels were low or when access was only possible from the bank. Otherwise, three to four grab samples were collected as one integrated grab sample.
In 2001, 6 samples were taken at 3 sampling sites; 2 samples at Waterman Road were non-detects; the 2 samples taken at Emerald Vista Drive and Florin Creek at Franklin Blvd. exceeded the CDFG criteria (Spector et al., 2004). |
Data Reference: | Placeholder reference 2006 303(d) |
Water Quality Objective/Criterion: | The narrative pesticide objectives state, in part:
- No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses, - Discharges shall not result in pesticide concentrations in bottom sediments or aquatic life that adversely affect beneficial uses, - Pesticide concentrations shall not exceed those allowable by applicable antidegradation policies, and - Pesticide concentrations shall not exceed the lowest levels technically and economically achievable. The Basin Plans narrative water quality objective for toxicity states that 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: | Placeholder reference 2006 303(d) |
Evaluation Guideline: | CDFG Hazard Assessment Criteria 0.16 ug/L 1-hour average (Siepman & Finlayson, 2000; Finlayson, 2004). |
Guideline Reference: | Placeholder reference 2006 303(d) |
Spatial Representation: | In 2001, Elk Grove Creek was monitored by the Regional Board at two sites - at Waterman Road and at Emerald Vista Drive. |
Temporal Representation: | Storm events were sampled during the orchard dormant spray season months of January and February 2001 and 2002, and January through April 2003, to determine pesticide concentrations in rain and creeks during and after the orchard dormant spray season. |
Environmental Conditions: | |
QAPP Information: | San Joaquin River TMDL Quality Assurance Project Plan. |
QAPP Information Reference(s): | |
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LOE ID: | 22082 |
Pollutant: | Diazinon |
LOE Subgroup: | Pollutant-Water |
Matrix: | Water |
Fraction: | Total |
Beneficial Use: | Warm Freshwater Habitat |
Aquatic Life Use: | Warm Freshwater Habitat |
Number of Samples: | 11 |
Number of Exceedances: | 5 |
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING |
Data Used to Asses Water Quality: | Eleven water samples were collected from Elk Grove Creek from February 2002 through February 2007, representing 11 4-day average concentrations and 11 1-hour average concentrations.5 of 11 four-day average concentrations exceeded the four day maximum concentration guideline of 0.100 µg/L.4 of 11 one-hour average concentrations exceeded the maximum 1-hour concentration of 0.160 µg/L. |
Data Reference: | Sacramento stormwater urban tributary NPDES permit monitoring data, 2003 to 2007 |
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: | 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 Fish and Game Hazard Assessment Criteria - 0.160 µg/L 1-hour average and 0.100 µg/L 4-day average concentration (Siepmann and Finlayson, 2000 and Finlayson, 2004). |
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 collected from Elk Grove Creek at Laguna. |
Temporal Representation: | Samples were collected on 02/02/2004, 02/18/2004, 04/13/2004, 01/28/2005, 02/15/2005, 04/12/2005, 02/07/2006, 02/27/2006, 03/06/2006, 12/08/2006, and 02/09/2007.Stream located in an urban area. |
Environmental Conditions: | |
QAPP Information: | Monitoring was conducted in accordance with Municipal Storm Water Permitting Program. Data was collected by the Sacramento Stormwater Quality Partnership for their municipal separate storm sewer systems permit. |
QAPP Information Reference(s): |