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) |
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DECISION ID |
10072 |
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Pollutant: |
Selenium |
Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: |
New Decision |
Revision Status |
Revised |
Impairment from Pollutant or Pollution: |
Pollutant |
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Weight of Evidence: |
This pollutant is being considered for listing under sections 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Data is available from 1 line of evidence for this pollutant. Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification for placing this water segment-pollution combination on the section 303(d) list. The recommendation is based on staff findings that 0 of 2 available concentrations exceeded the Department of Public Health Primary MCL and this does not exceed the allowable frequency using Table 3.1 of the Listing Policy. The recommendation is based on staff findings that 0 of 2 available concentrations exceeded the Basin Plan Objective for Selenium and this does not exceed the allowable frequency using Table 3.1 of the Listing Policy. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
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RWQCB Board Decision / Staff 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. |
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SWRCB Board Decision / Staff Recommendation: |
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USEPA Decision: |
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LOE ID: |
20762 |
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Pollutant: |
Selenium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
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Beneficial Use: |
Municipal & Domestic Supply |
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Number of Samples: |
2 |
Number of Exceedances: |
0 |
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Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
0 of the 2 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Selenium. |
Data Reference: |
SWAMP data entered by SWRCB into BDAT database |
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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 |
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Evaluation Guideline: |
Selenium levels should not exceed 50 ug/L (Department of Public Health Primary MCL) |
Guideline Reference: |
Compilation of Water Quality Goals |
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Spatial Representation: |
Samples were collected at Greenhorn Creek. |
Temporal Representation: |
The samples were collected from Jun 19 2001 to Sep 8 2003 |
Environmental Conditions: |
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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: |
6760 |
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Pollutant: |
Selenium |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
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Beneficial Use: |
Cold Freshwater Habitat |
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Number of Samples: |
2 |
Number of Exceedances: |
0 |
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Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
0 of the 2 samples collected by the Surface Water Ambient Monitoring Program exceeded the evaluation objective for Selenium. |
Data Reference: |
SWAMP data entered by SWRCB into BDAT database |
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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 |
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Compilation of Water Quality Goals |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Samples were collected at Greenhorn Creek. |
Temporal Representation: |
The samples were collected from Jun 19 2001 to Sep 8 2003 |
Environmental Conditions: |
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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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DECISION ID |
4336 |
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Pollutant: |
Aluminum |
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)(2006) |
Revision Status |
Original |
Impairment from Pollutant or Pollution: |
Pollutant |
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Weight of Evidence: |
This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. A insufficient number of samples exceed the chemical constituents water quality objective.
Based on the readily available data and information, the weight of evidence indicates that there is insufficient 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. One of 10 samples exceeded the Drinking Water Secondary MCL criterion 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. |
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RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
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SWRCB Board Decision / Staff Recommendation: |
This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
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USEPA Decision: |
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Lines of Evidence (LOEs) for Decision ID 4336 |
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LOE ID: |
2602 |
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Pollutant: |
Aluminum |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
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Beneficial Use: |
Municipal & Domestic Supply |
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Number of Samples: |
10 |
Number of Exceedances: |
1 |
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Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
One of 10 samples exceeded the Secondary MCL. (USGS, 2004c). |
Data Reference: |
Placeholder reference 2006 303(d) |
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Water Quality Objective/Criterion: |
Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses. The chemical constituent objectives in Table III-1 apply to the water bodies specified. Metal objectives in the table are dissolved concentrations. 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 4449-B (Secondary Maximum Contaminant Levels-Ranges) of Section 64449. |
Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
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Evaluation Guideline: |
Drinking Water Secondary MCL (0.2 mg/L). |
Guideline Reference: |
Placeholder reference 2006 303(d) |
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Spatial Representation: |
Samples were collected along Greenhorn Creek. |
Temporal Representation: |
Samples were collected in1999, 2000, and 2001. |
Environmental Conditions: |
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QAPP Information: |
Data from USGS reports are considered of adequate quality per section 6.1.4 of the Policy. |
QAPP Information Reference(s): |
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DECISION ID |
4911 |
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Pollutant: |
Methylmercury |
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)(2006) |
Revision Status |
Original |
Impairment from Pollutant or Pollution: |
Pollutant |
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Weight of Evidence: |
This pollutant is being considered for listing under section 3.5 of the Listing Policy. Under section 3.5 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. None of the samples exceeded the USEPA tissue criterion.
Based on the readily available data and information, the weight of evidence indicates that there is not 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. A methyl mercury water quality guideline is available that complies with the requirements of section 6.1.3 of the Policy.
2. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
3. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
4. None of 67 samples exceeded the criterion.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
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RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
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SWRCB Board Decision / Staff Recommendation: |
This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
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USEPA Decision: |
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Lines of Evidence (LOEs) for Decision ID 4911 |
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LOE ID: |
2603 |
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Pollutant: |
Methylmercury |
LOE Subgroup: |
Pollutant-Tissue |
Matrix: |
Tissue |
Fraction: |
Total |
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Beneficial Use: |
Commercial or recreational collection of fish, shellfish, or organisms |
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Number of Samples: |
0 |
Number of Exceedances: |
0 |
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Data and Information Type: |
Not Specified |
Data Used to Assess Water Quality: |
Sixty-eight frog tissue samples were collected from various sites in the Greenhorn Creek. However, there is no applicable guideline to determine mercury exceedance in the tissue samples. (USGS, 2004c). |
Data Reference: |
Placeholder reference 2006 303(d) |
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Water Quality Objective/Criterion: |
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Objective/Criterion Reference: |
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Evaluation Guideline: |
There is no applicable numerical guideline available to assess methylmercury in amphibian tissue. |
Guideline Reference: |
Placeholder reference 2006 303(d) |
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Spatial Representation: |
Samples were collected from 17 sites in the creek. |
Temporal Representation: |
Samples were collected in late summer - early fall (8/12/99 - 10/16/01). |
Environmental Conditions: |
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QAPP Information: |
USGS Methods Manual |
QAPP Information Reference(s): |
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DECISION ID |
4899 |
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Pollutant: |
Sulfates |
Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: |
Do Not List on 303(d) list (TMDL required list)(2006) |
Revision Status |
Original |
Impairment from Pollutant or Pollution: |
Pollutant |
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Weight of Evidence: |
This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.
One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.
Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the 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 43 samples exceeded the Secondary MCL for Sulfate (CCR, Title 22) 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. |
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RWQCB Board Decision / Staff Recommendation: |
No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed. |
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SWRCB Board Decision / Staff Recommendation: |
This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed. |
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USEPA Decision: |
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Lines of Evidence (LOEs) for Decision ID 4899 |
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LOE ID: |
2605 |
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Pollutant: |
Sulfates |
LOE Subgroup: |
Pollutant-Water |
Matrix: |
Water |
Fraction: |
Total |
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Beneficial Use: |
Municipal & Domestic Supply |
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Number of Samples: |
43 |
Number of Exceedances: |
0 |
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Data and Information Type: |
PHYSICAL/CHEMICAL MONITORING |
Data Used to Assess Water Quality: |
None of 43 samples exceeded the secondary MCL for sulfate. (USGS, 2004c). |
Data Reference: |
Placeholder reference 2006 303(d) |
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Water Quality Objective/Criterion: |
250 mg/L (ppm) Secondary MCL for Sulfate (CCR, Title 22) |
Objective/Criterion Reference: |
Placeholder reference 2006 303(d) |
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Evaluation Guideline: |
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Guideline Reference: |
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Spatial Representation: |
Samples were collected from 22 sites. |
Temporal Representation: |
Sample were collected from March 1999 through December 2001. |
Environmental Conditions: |
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QAPP Information: |
USGS National Field Manual for the Collection of Water-Quality Data.Quality control samples were presented with the data. |
QAPP Information Reference(s): |